"@type": "Answer", When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position A circuits expected output voltage has either gone above or below the sensors expected range. Use a proper OBDII scan tool to pull the stored MIL check engine light trouble code. The throttle position sensor is located on the throttle body and once it fails, code P2135 may get triggered. P0134 Is Your Car Suffering From A Bad O2 Sensor? You can do this using a digital multimeter. Most often cause for this code is a faulty TPS sensor. If it's present, check the ground circuit for open or shorts. More than 5% at idle or less than 90% at WOT indicates a potential problem with the sensor as well. You dont want to trust your gut and replace a good sensor that will cost you a ton of money. This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. This will create problems with this sensor and possibly cause the sensor to malfunction and get wrong readings. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair. In these situations, you might want to replace the connector and fix the problem with the P0121 Toyota. Dream car: tie between a 71 Hemi Cuda and a 91 GMC Syclone. In some cases, a no-start condition may even result. somewhere in the circuit that must be repaired. So, pay close attention and follow us carefully. Open the throttle body with your hand using the pulley on the side if you have a cable operated system, or push on one side of the throttle plate to push it open. Check Engine Light diagnostic While driving Nissan vehicle is losing power but not cutting off After a while all power is returned. When theres a problem with the circuit or the wiring, the P0121 trouble code can trigger. As an Amazon associate, I earn from qualifying purchases. The common causes of the P0121 include bad throttle body, dirty throttle body, bad throttle position sensor, bad TPS connection, shorted TPS circuit, electrical terminal corrosion. The P0121 code signifies a malfunctioning or failed Throttle Pedal Position Sensor/Switch (TPS). Modern car diagnostics is a lot more and a lot deeper than you can imagine. Enter your details to see certified shops near you that offer upfront estimates, guaranteed fair pricing, and a minimum 12-month, 12,000-mile warranty. Then turn the ohmmeter and an ideal measuring should be somewhere around .3 ohms. Well, on average, the sensor costs between $75 to $100. The harder you step on the pedal, the more urgent that power is needed. What Are the Best Auto Loan Rates for 72 Months? Then, a pair of TPS sensors relay the throttle positon to the control module so it knows everything is working properly. As the throttle is opened, the reading (measured in volts) "name": "What Causes A P0121 Code", throttle opening. P0100 Mass or Volume Air Flow Circuit Malfunction. It is a type of variable resistor which changes its resistance value according to throttle position. Your TPS A Circuit has an expected output voltage range, as does your TPS B Circuit (if so equipped). Fix this code immediately (same-day if possible) to avoid being stranded. Visually checks all TPS connections and wiring for any loose or damaged items. . I am here to help you with your car questions. and our Testing the throttle positon sensor and its circuit. If other codes are present, they must be addressed first. P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem Reply Save Like These symptoms actually are going to help you when it comes to overcoming this problem quickly and effectively. This is why if your car immediately stalls after you start the engine, you should suspect that the stalling issue is because of the TPS sensor. Learn how your comment data is processed. If its full of thick carbon deposits and the flap is not closing correctly, you might want to replace it completely. P0122 - Throttle/Pedal Position Sensor A Circuit Low. This is a clear example of a bad throttle body or a bad throttle body position sensor that you need to check. } Take 5 Oil Change Prices How Much Is A Take 5 Oil Change? You will then receive an email that helps you regain access. Car Brake System Parts Explained in Detail. Tools/parts needed (our top picks from Amazon): Use FIXD to scan your vehicle to verify P0121 is the only code present. There are a few codes that might pop up but mainly the P0121 code is predominant because this is a problem with the Circuit A of the sensor. Autocareaids.com is a participant in the Amazon Services LLC Associates Program. #GirlDad #SaveTheManuals, P0121 Meaning, Causes, Symptoms, & Fixes. We have a team of writers working daily on common car problems. All of these things happen instantaneously after you step on the gas pedal. Have you gotten the check engine light and the P0121 code? Does it drop out? Then we covered the problem and then we covered the causes and the symptoms that you will face when you have an issue like this. This sensor produces bad values and there could be delays and other malfunctions when it comes to observing the position of the flap inside of the throttle body. The ECM turns the Check Engine Light on and goes into a failsafe mode by cutting current to the throttle actuator to put the throttle valve to approximately less than 6 degrees opening. It's a general powertrain code, which means that it has the same meaning regardless of who manufactured the vehicles (1996+). Chris communicated with us each step of the way up until his arrival. When this problem is encountered, your MIL status will trigger and your check engine light will turn on. As the throttle opens, this sensors (voltage) readings go up and send signals to the ECM/PCM. Slowly depress the gas pedal; you should see the TPS PID value increase. The Powertrain Control Module (PCM) or ECM provides a 5V reference signal to the TPS and ground too. lets cover the throttle position sensor diagram first and learn more about the basics of this component. If you happen to own a later model vehicle, the Pedal Position Sensor is part of the Accelerator Pedal assembly. Based on the information provided, the computer will send more air and fuel into the internal combustion chamber of the engine so that it can generate more power. You can test the APPS sensor with a multimeter. YourMechanic All rights reserved. There are also other codes concerning Circuit A that you should know. Now lets focus more on diagnosing the bad TPS sensor and the P0121 code. The connector and the wiring are also an option that is worth inspecting. If the rust is too excessive you might be needing to replace the whole connector or sensor to fix the P0121 code. Start with a visual inspection of the sensor and its wiring. Now lets move on and focus more on the symptoms of a bad throttle position sensor and the P0121 code. P2121 2017 TOYOTA RAV4 - Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance. Leave the connector attached and insert one back probe test lead into the signal wire pin of the connector, and attach the other to ground. Or eventually fixing a wiring problem that you are having on your car that is causing these problems." P0103 Mass or Volume Air Flow Circuit High Input. OBD II TROUBLE CODES. During its rotation, the powertrain control module receives a voltage signal from the throttle position sensor. Make sure the signal circuit isn't 12V. you take on any vehicle. Electrical components do not like water at all. Circuit A is usually the wire with the 5V power supply. We need to elaborate on these causes in detail so you get a better idea of how to overcome them. You'll need an oscilliscope. This is something that ca be purchased at most local auto parts stores (i.e. Spraying cleaner directly into the throttle body, instead of onto a rag, can damage the electrical components connected to the throttle body. Does your Toyota have Safety Recalls? The sensor then sends a return signal voltage to the PCM. Touching the black multimeter lead to ground and the other to the power feed on the connector, you should see a reading thats close to battery voltage. This is why you need to put up your sleeves and start troubleshooting the matter. The TPS sensor circuit A learned range output to the ECM went above the specified voltage difference between TPS sensor circuit B by more than 1.6 volts. Recommended changing filter after roughly every 50 runs. Throttle body cleaning costs around $200 if done for you by an auto mechanic or technician. So, in our case, Circuit A is not performing as it should. If the powertrain control module receives unusual data from the Throttle Position Sensor "A" Circuit, then it'll trigger trouble code P0121. If you have access to a scan tool, see what the idle and WOT (wide open Gracias. Cooler plugs into 110v power, with a voltage converter switching power to 12 volts to run the gauge, pump, and fan. "name": "What Does Code P0121 Mean", 4. More on that in the following chapter. Fixing this code is only possible by replacing the sensor if it is faulty. This component can fail and cause issues like these in some cases. P0121 Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance. P0121 - Throttle/Pedal Position Sensor/Switch "A" Circuit. P-QM 4.h 6. to help you do just that. Contact Us In these systems, a motor is used to operate the throttle using inputs fromposition sensors on the accelerator pedal. If it is still tripping the code, use a multimeter to check for an open or short in the throttle position sensor. No change indicates there is no input from the sensor. | How to Change Power Steering Fluid? Requires performance reporting, including reporting on performance measures or key process indicators from any source including delegated entities. Your TPS is connected to a reference wire with five volts and typically a ground wire. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module ( ECM ). Enter your information to get the most likely fix for your P0 code and how much it will cost. This issue will be most notable if the voltage that the sensor produces is below 0.95V. The possible causes of Range/Performance codes are likely to be defective sensors as easily as they are likely to be the result of wiring issues that affect the operation of the affected sensor or component, which means that with these codes, it is important to regard all sensors and components as part of the control circuit the code refers to. 6. More precisely Circuit A has abnormal voltage readings. Reset your ONT battery. If not, you have a problem with the sensor power supply. Welcome to Motor Verso. Reddit, Inc. 2023. If you still need help regarding the P0121 trouble code, please post "text": "This code represents a problem in your throttle body position sensor. Wordfence is a security plugin installed on over 4 million WordPress sites. To do that, you The light illuminated again and it showed a P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem. It should never have battery voltage. Save my name, email, and website in this browser for the next time I comment. There should always be a steady reference voltage that maxes out at 5 volts. This means that the sensor is faulty and needs to be replaced. But why is this happening? More precisely Circuit A has abnormal voltage readings. If the throttle body housing all the throttle components, is cracked, you will need to buy a new one, which costs around $500 $600. All information on this site is copyright protected. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Autocartimes is purely a site related to the latest and trending car tips, and we also share the latest car products reviews. You might want to troubleshoot the issue and check its condition of it. It is better to get a microfiber towel and cleaning solution and avoid using a power washer because of these things. "acceptedAnswer": { As you move the throttle pedal the readings should increase." Well, this is mainly caused by the bad sensor. The TPS sensor circuit A learned range output to the ECM went below the specified voltage difference between TPS sensor circuit B by going less than .8 volts. DTC Description P1545 Throttle valve control system malfunction P0121 Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High If the throttle body is visibly dirty, remove it and clean it with throttle body cleaner. "acceptedAnswer": { The next thing that we would like to discuss when it comes to the causes of the P0121 GMC is the situation when you have corrosion inside of the connector and the connections become corroded. Recommends institution of needed action as a result of reviews of reports or data analysis. and can miss an intermittent drop out. Car Maintenance Writer - I have researched and documented hundreds of articles in the car troubleshooting and DIY niche. This will result in limited power output from the engine and you will basically be stuck in one position and no matter how you press on the gas pedal, the engine will simply not go any further. No MAP or TP sensor codes set, engine running, ECT input over 158F, MAP input under 50 kPa or over 70 kPa, MAP input steady, and PCM detected the Actual TP input was over the Calculated TP input with MAP input under 50 kPa, or was below the Calculated MAP input with the MAP input over 70 kPa for 10 seconds. To sum things up, the common causes for code P0121 are as follows: Symptoms consistent with a faulty throttle position sensor include: hesitation or stumbling upon acceleration, unstable idle, and an illuminated check engine light. P0121 code is a Diagnostic Trouble Code (DTC) that indicates an issue with the Throttle Pedal Position Sensor/Switch (TPS) A range. P1345: Powertrain DTC: Camshaft to Crankshaft Position Correlation Fault Condition (GMC/Chevrolet), P0016: Crankshaft Position A Camshaft Position Correlation (Bank 1). What Used Cars are the Cheapest to Insure in Virginia, What Used Cars are the Cheapest to Insure in Wyoming. P0121 Jaguar Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance. If the TPS checks out OK, but you still have P0121 code illuminated, youll need to check the sensor circuit. P2135-29bThrottle/Pedal Position Sensor/Switch "A & B" Circuit Range/ Performance-Signal InvalidStatusMemorizedP0121-29 Throttle/Pedal Position Sensor/Switch. Circuit A, Circuit B, and Circuit C. There is a signal wire that goes to your PCM which is Circuit B. The second in our list of symptoms of a bad throttle body position sensor and the P0121 code is the jerking and hesitation at some points when you press on the gas. costs, Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance. As we cleared the diagram for the TPS sensor and the meaning of the P0121 code, now we can move on to other topics. Typically, the sensor should read around 4.5 volts at wide open throttle and .45 volts with the throttle at the idle position. for $154.99 The amount youd spend depends on what got spoilt. Do repairs yourself and save $1000s. Well, this means that you have a problem with the throttle body position sensor on your car. Not scanning, documenting, clearing or retesting for codes to verify failures, Replacing a TPS sensor before tests indicate a problem, Not comparing TPS sensor A and B specifications before and after repair or replacements. If so you may need to reprogram your throttle or accelerator pedal assembly to reset the throttle signal. Many, if not most, shops will apply this diagnosis fee to any required repairs if you have them perform the repairs for you. This tests for continuity between the sensor and PCM. throttle) readings are for the TPS. "text": "Most often cause for this code is a faulty TPS sensor. The pedal position sensor and throttle position sensor detect how hard you press down on the gas pedal. More precisely with the voltage on the sensor. Made with in Silicon Valley. However, the analysis and opinions expressed are our own. As the throttle is opened, the voltage reading goes up. Repair Urgency: Fix this code immediately (same-day if possible) to avoid being stranded. This enables you to spot any fleeting problems. If youd like to try to fix code P0121 at home without throwing money at parts, youll want to follow the steps below for proper diagnosis. If you happen to own an electronic throttle, this is included in the throttle body. goes up. He also scheduled my next appointments which will be with him. So, what does the throttle position sensor cost? It's an OBDII code and has to do with the Throttle Pedal Position Sensor. What Used Cars are the Cheapest To Insure in Tennessee? AI Car Expert: P-QM 3.g, P-QM4.h 5. But how you can fix a P0121 code? P0121 Infiniti Throttle Position Sensor Circuit Range/Performance Problem. When it comes to making repairs associated with the P0121 code, one or more of the below repairs may be needed to solve the underlying issue. Ask me anything. Anything above or below these readings will trigger this code. Anything above or below these readings will trigger this code." Check for service outages. So, this indicates a short in the system. . This site uses Akismet to reduce spam. First, you want to disconnect the sensor connector and test for power and ground. - Sherlock Holmes. Corrosion on terminal ends of electrical connections. The reason is because scan Using the live data function of the FIXD sensor and app allows you to read and analyze inputs from the throttle position sensor and the throttle body temperatures to properly diagnose a P0121 code. From my observation, Mr. Barber appears to be quite professional. signal. And move on from there. Check the throttle body assembly for binding and signs of contaminant buildup. The vehicle would be able to be driven very slowly with limited throttle response. Code P0121 Possible Causes Faulty Throttle Body Assembly Throttle Body Assembly harness is open or shorted Throttle Body Assembly circuit poor electrical connection Faulty Engine Control Module (ECM) How do I Fix the Code P0121? The P0121 code will cause the engine ECM to go into a failsafe mode, which will cause various drive complaints until repairs are done like lack of acceleration, high idle, bucking or jerking, limited speeds, or stalling, depending on manufacturer failsafe mode strategy. Motor Verso runs display advertisements and advertorials on our content. The ECM controls fuel injection and timing to control engine speeds. This means that you may require a replacement unit. How does throttle position sensor Work? Start by consulting the repair information for your vehicle to determine which pin on the connector is power and which is ground. Dream car: tie between a 71 Hemi Cuda and a '91 GMC Syclone. I am ashamed to admit that I didn't write down the first code but it has not returned. With the scope, you can view the voltage signal as a wave form. Potential Causes Repair Solutions What Does This Error Code Mean? P228C GMC - Fuel Pressure Regulator Control Performance Low Pressure. Note:A Range/Performance related code will be set when either a sensor or other component does not perform within the range the PCM (Powertrain Control Module) expects to see, given the current engine load/speed, and information gathered from other sensors. The connector and the wiring are also an option that is worth inspecting." Diagnostic trouble code (DTC) P0221 stands for "Throttle/Pedal Position Sensor/ Switch B Circuit Range/Performance Problem." A "range" or "performance" problem typically means that the sensor in question doesn't always agree with the other redundant sensors. As we already explained there are three circuits. Cars With 3rd Row Seating And Good Gas Mileage, The sensor harness is rubbing causing an open or short in the wiring. guides, Check cars for recalls, common issues & maintenance For this, you will need to get some alligator clips and then connect everything like in the video. "@type": "FAQPage", How much can you expect to pay for this work to fix the P0121 code? Engine Soon light), Intermittent stumble on acceleration or deceleration, TPS has intermittent open or short internally, Harness is rubbing and causing an open or short in the wiring, Water or corrosion in connector or sensor. Our certified mobile mechanics can come to your home or office to perform the 2023 FIXD, Inc. All Rights Reserved. This article explains the symptoms, causes, and tips on how to clear the P0121 DTC from your vehicle. More precisely out of the range of 0.95V and 5V. "@context": "https://schema.org", The engine codes you are receiving are indicating that your throttle position sensor (https://www.yourmechanic.com/parts/throttle-position-sensor) and its circuit are not functioning correctly. So, this chapter is dedicated to them. We don't have data for this code for your car. Unfortunately, FIXD is not guaranteed to be compatible with your vehicle. Other TPS sensor and circuit related DTCs: P0120, P0122, P0123, P0124. your question in our FREE car repair forums. Having a problem like this with your throttle can be a real pain to deal with. The Throttle Position Sensor is usually mounted in the throttle body. Throttle position (TP) sensor A/accelerator pedal position (APP) sensor A -range/performance problem, Accelerator cable adjustment, TP/APP sensor. If the visual inspection doesnt reveal anything obvious, its time to move on to testing the sensor. William was courteous, and attentive to the issue. This means that on the connector there are three pins in total which make 3 circuits. A number of incident memory entries with regard to the throttle valve are stored in the ECM. The drive symptoms of all TPS codes will be roughly the same. The third most common reason for the bad TPS sensor and the P0121 code is the problem with the connector of this sensor. Failing that you may need to test the accelerator pedal to see if theres a problem. 5. If you want you can jump to the next chapter where we elaborate more on the problem. Lifelong automotive enthusiast with a soft spot for offroading. This will help you when you will get your multimeter and start diagnosing stuff. So, if you want to learn more, follow along. It is not intended as repair advice and we are not responsible for any actions The second most common cause for a problem like the P0121 Chevy code is a situation when you have a problem with the wiring harness of your car. Clearing the OBD-II fault codes and retesting the vehicle to see if the P0121 code comes back. Below is a quick rundown of the cost of fixing this error code. These shops can not only help you figure out whats going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing. If not, youll need to consult the ground side of the wiring diagram to find where the circuit fault lies. Mi volkswagen tiguan se le prende el testigo epc y entra en modo de proteccin de motor tengo que apagarlo y volver a prender para que se apague el epc y trabaja normal nose que ser ya le he revisado varias cosas y estn bien. All content 2004-2023 OBD-Codes.com, 06 Chevy Impala P0011, P0121, P0449, P0455, P1516, P2101, P2143, and C0700, 99 silverado codes p0101 p0121 p0300 p0507, Toyota rav4 2006 model p0121,p0123,p0705,p2135, post Place one alligator clip on pin number 4 and one on pin number 6. This check engine light by itself doesnt tell a lot. set this code. Diagnose and fix your engine check engine light yourself with FIXD! What Used Cars are the Cheapest To Insure in Rhode Island? First, you want to disconnect the sensor connector and test for power and ground. Well, it is almost impossible to fix this sensor without replacing it. This will trigger an alarm for the PCM and will throw the P0121 Chevy Silverado code. November 13, 2018 by Jason P0121 is a relatively common trouble code with the Kia Sportage. With YourMechanic you can skip the auto shop altogether. Has been updated to the Master Sticky (or will be very shortly). I did stupid and floored it until I hit the end of travel limit switch pedal and I got the OBD2 trouble code #P0121 (Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance) The pedal seems to send the proper message to the engine; if I depress it very slowly the engine very slowly picks up speed which makes me to believe that . Code P0121 Toyota Possible Causes Faulty Throttle Position Sensor (built into Throttle Body Assembly) Throttle Position Sensor circuit is open or shorted Throttle Position Sensor poor electrical connection Faulty Engine Control Module (ECM) Depending on the shops labor rate, this typically costs somewhere between $75-$150. All TPS codes will cause the ECM to go into failsafe mode. Lets find out next. Popular Engine Codes P0420 P0172 P00171 P0128 P0300 P0456 P0430 P0442 P0455 P0113. data and problem cases identified while performing utilization review. The circuit inside of this sensor has shorted out and is causing abnormal readings. The throttle position sensor (TPS) is located on the throttle body. Consult the repair information for your vehicle to determine what the exact TPS readings should be. So, if the voltage is below and above these limits it means that the sensor is broken and needs replacing. In most cases, your powertrain control module will activate a failsafe mode in order to reduce your acceleration speed limit. #GirlDad #SaveTheManuals. This is the component to which this sensor is attached on. As you probably know, there are a lot of people who are reading this article and are not quite familiar with car diagnostics in general and dont quite understand how this is done on a car. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Tech Tip: DO NOT spray throttle body cleaner into the throttle body. 3. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Drop me a line if you have any questions! If you are comfortable with swapping the entire unit out, then that is P0031 trouble code definition P0031 is the code for HO2S Heater Control Circuit Low (Bank 1 Sensor 1) What the P0031 code P0183 code definition Fuel Temperature Sensor A Circuit High Input What the P0183 code means P0183 is a generic OBD-II code indicating P2507 P2507 code definition ECM/PCM Power Input Signal Low What the P2507 code means P2507 is an OBD-II generic code for the engine control module (ECM) detecting the power input to the ECM is below the required voltage for the P0121 is a diagnostic trouble code (DTC) for "TPS "A" Circuit Range Performance Problem". Pro Street Online is your number 1 source for How To articles, DIY guides and the latest and greatest in automotive news. All our repairs are backed by our 12-month / 12,000-mile warranty. And if you have the P0121 code, you can see that you are having a bad TPS sensor. Now lets move on to the next symptoms of a bad throttle body position sensor. More precisely the P0121 code. Without the proper working order of the throttle body and its sensors, this operation cannot be regulated. 2023 What Does P0121 Code Mean? }] Cookie Notice P2121 2017 TOYOTA RAV4 - Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance. P0101 Mass or Volume Air Flow Circuit Range/Performance Problem. Well, the PCM supplies a 5-volt reference signal as well as a ground connection. If you are a WordPress user with administrative privileges on this site, please enter your email address in the box below and click "Send". Youll need to consult the power side of the wiring diagram to find where the circuit fault lies. Namely, we would like to cover the causes for the P0121 Chevy Silverado. If at this point the vehicle is still setting the same code, you may have a more serious problem with your cars engine coolant system, and you should bring the vehicle to a certified shop to have further diagnostic work performed. Most auto repair shops charge between $75 and $150 per hour. So, you can expect problems like these. Now lets move to the next probable cause. P0456: Evaporative Emissions System Small leak detected, P0340: Camshaft Position Sensor Circuit Malfunction, Wheel Bearing Replacement Cost (Front, Rear and Hub), 5 Best Catalytic Converter Cleaner for Your Car, Camshaft Position Sensor Function, Bad Symptoms and Replacement Cost, 5 Symptoms of Bad Piston Rings in Your Car, Power Steering Rack Pinion Leak (Replace vs, Wheel Bearing Replacement Cost (Front, Rear and, 5 Best Catalytic Converter Cleaner for Your, Autocartimes.com: The Best Auto Car Guide. This is not a severe issue, but it needs to be fixed as early as possible. Next, set your multimeter to the volts setting. Whenever you step on the gas pedal to accelerate the vehicle, you are basically demanding more power from the engine. P0120 Throttle/Pedal Position Sensor/Switch A CircuitP0121 Throttle/Pedal Position Sensor/Switch A CircuitP0122 Throttle/Pedal Position Sensor/Switch A Circuit LowP0123 Throttle/Pedal Position Sensor/Switch A Circuit HighP0124 Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. What is important for you is to know that this is a three-wire sensor. Required fields are marked *. Arrived early which was great. "@type": "Question", How To Fix Tech Notes Cost to Diagnose Description Add Comment What does this mean? There are a ton of codes and problems. This operation is repeated several times as you drive. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. But you should find it by yourself based on the instructions. Anything that is not up to these specs will trigger this code." This repair requires mechanical knowledge and is not recommended for beginners. Once the insulator material melts, the two naked wires will come in contact. There are many different types of throttle circuits, depending on the year of your vehicle. Even though it took several attempts I'm so happy he was determined to fix it and he did! If you take your car to a shop for diagnosis, most shops will start with an hour of diag time (the time spent in labor diagnosing your specific issue). If they dont come back, your problem is solved. Our certified mobile mechanics can come to your home or office to perform the. Check if they're close to the specifications This can easily be done using a digital multimeter set to the volts setting. In short, this sensor is designed to take the input from Your pedal and translate it to the engine. if you can't get the complete list, I can probably comp you the pdf version. When the gas pedal is depressed, the control module commands the throttle to open. I love getting my hands dirty and repairing a car myself for a tenth of the price where possible. If you make a purchase through any of the links, I may earn a small commission at no extra cost to you. You can do this using a digital multimeter. "@type": "Answer", If the PCM detects that the But more in-depth we are going to cover this in the following chapter where we will briefly discuss the throttle position sensor diagram. What causes the P0121 code? You can also read the documentation to learn about Wordfence's blocking tools, or visit wordfence.com to learn more about Wordfence. Spray throttle body cleaner on a rag (this rag will get extremely dirty; dont use one you cant afford to throw away). What Used Cars Are the Cheapest to Insure in Oregon? Throttle Control Circuits dictate the amount of opening for your throttle body in relation to your accelerator pedal. The first thing that you will have to do in this case is to grab an OBD2 scanner and scan the car for codes. P0121 is a generic OBD-II code which indicates that the Engine Control Module (ECM) has seen the TPS sensor circuit A learned output voltage go above or below the sensor's expected range when compared to TPS sensor circuit B. We cannot guarantee the accuracy of all trouble codes. When you check and the connector is in good shape, check the sensor itself for physical damages or failure. Check the "Possible Causes" listed above. Get a fair and transparent estimate upfront, P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem, Get a quote and book an appointment online, Symptoms of a Bad or Failing Evaporation Vent Solenoid, P0455 OBD-II Trouble Code: System Gross Leak Evaporative Emission, P0023 OBD-II Trouble Code: Camshaft Position B - Actuator Circuit (Bank 2), P0132 OBD-II Trouble Code: O2 Sensor Circuit High Voltage (Bank 1 Sensor 1), P0031 OBD-II Trouble Code: HO2S Heater Control Circuit Low (Bank 1 Sensor 1), P0183 OBD-II Trouble Code: Fuel Temperature Sensor A Circuit High Input, Codes P0121, P0221, P2101, P2104, P2110, P2111, Reduced Engine performance message, car cannot exceed 10 mph, P2507 OBD-II Trouble Code: System Too Rich (Bank 1). Typically, the signal value at idle will be about .45 volts. Save my name, email, and website in this browser for the next time I comment. When any of the systems fail, it sends wrong signals to the computer, which interprets the signals to adjust the performance of the engine, and in most cases, triggers the check engine light. Notify me of follow-up comments by email. P0121: Throttle Pedal Position Sensor Switch (TPS) A Circuit Range Performance Problem The basic meaning of this code is Throttle Position Sensor/Switch A Circuit Range/Performance Problem. P0123 2016 TOYOTA RAV4 - Throttle / Pedal Position Sensor / Switch 'A' Circuit High Input. Place one alligator clip on pin number 4 and one on pin number 6. This is readily available at any auto parts store. However, PCMs rarely go bad, so make sure you double check all of your work before condemning the PCM. Your email address will not be published. The lowest recommended voltage is 0.95V while the top voltage should be no more than 5V. If the TPS connector is bad, the sensor would always malfunction; so, you need to check this and have the connector replaced if its in bad shape. What this error code means is that the voltage that your ECU / PCM expects is either too high or too low. If you have a traditional wire throttle unit, the throttle position sensor or Powertrain Control Module may have gone bad. Using a digital multimeter set to the ohms, connect one side of the meter to the harness side of the TPS connector and the other to the TPS input pin on the PCM. If not, the PCM is likely the problem and should be replaced. "@type": "Answer", On-Board Diagnostics II OBDII. This will increase the amount of air entering the engine, and allows the PowerTrain Control Module or PCM to increase fuel. When you depress your gas pedal, the throttle opens, allowing more air into your engine. When the TPS fails, these are the most common issues you may face with your vehicle. What Does Code P0121 Mean? When the voltage signal is weak, the powertrain control module decreases the air to fuel ratio and the timing of the ignition. If everything is OK up to this point, youll want to check the TPS signal wiring to the PCM. The engine may idle higher than normal and not accelerate as before. The last symptom of the bad TPS and the P0121 that we are going to cover is the issue with stalling of the engine. P0121 Hummer Throttle Position Sensor 1 Performance. Note: The symptoms are determined by the manufacturer failsafe ECM strategy for the vehicle during a failure and may vary between manufacturers and vehicles. Engine running, then the PCM detected a TP sensor signal that indicated that the throttle did not return to its closed position following an off-idle engine speed condition. P0014 Meaning, Fixes, Causes, Details & Troubleshooting. Connect the scan tool to the diagnostic port, and scroll through the PID list until you find the TPS voltage or position PID. > Find a RepairPal Certified Shop Near You. Well, because the throttle is really sensitive and basically allows your car to move forward. Start by consulting the repair information for your vehicle to determine which pin on the connector is power and which is ground. Technically, the OBD definition of the P0121 code is Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem. Symptoms of a P0121 trouble code could include: A code P0121 may mean that one or more of the following has happened: 1. If it does, trace circuit for short to voltage and repair. (adsbygoogle = window.adsbygoogle || []).push({}); The powertrain control module (PCM) supplies a 5 Volt reference signal Motor Verso is an automotive website; for car enthusiasts, run by car enthusiasts. Comes with 4.5 -6AN lines and 2 sets (male and female) of quick disconnect fittings that connect to the transmission. NOTE: This information is presented for information purposes only. Some friends tell me that you do injector cleaning and intonation greater, but I have my doubts. "text": "You can test the APPS sensor with a multimeter. Then there is Circuit C which is the ground wire and lastly is Circuit A which is the 5V power wire that also comes from the PCM. If you get a code like the P0121 it means that you have either a too low voltage or too high voltage. P0123 - Throttle/Pedal Position Sensor A Circuit High Many late model vehicles dont use a throttle wire. So, if the ECM/PCM receives signals greater or less than the standard RPM range(s), it will store the P0121 DTC. Trouble Codes. Remember the recommended voltage is between 0.95V and 5V. Autozone, Oreily's, etc.) If you have no TPS signal, check for 5 Volt reference at the connector. In newer model cars with electronic throttle bodies, you may need to have a throttle body relearn procedure performed after this service. P0121 code is a Diagnostic Trouble Code (DTC) that indicates an issue with the Throttle Pedal Position Sensor/Switch (TPS) A range. First, we covered the basics of car diagnostics and the tools you will need to do this work on your car. This process is called back probing. If you continue to let the problem persist without getting it fixed, then your engine could suffer irreparable damage. "acceptedAnswer": { Click below to save 67%! Well, if this is the case, then you are at the right place because there will be a lot to cover on this topic where we will learn everything when it comes to this issue. The labor will also be about $100. We've partnered with RepairPal to recommend trustworthy shops in your area. You should fix this code as soon as possible. You can also test the TPS with a scan tool. The sensors send this information to the powertrain control module, which is the central computer of the vehicle. . This sensor/switch is installed on the throttle body assembly of every vehicle; older cars may have just one of these sensors, but newer vehicles with electronic throttle control (ETC) have at least two. If so, These circuits control the stepper motor thats part of your throttle body. This article explains the symptoms, causes, and tips on how to clear the P0121 DTC from your vehicle. i have replaced my throttle position sensor and my pedal position sensor. P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem The Throttle position sensor is a potentiometer that measures the amount of throttle opening. The throttle position sensor is located on the throttle body of the intake manifold. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. }. So, how to fix throttle position sensor? This means that if the voltage is lower than this, the engine will simply shut off because there will not be enough voltage to keep it idling. Next, set your multimeter to the volts setting. When code P0121 is triggered, your ECM will go into failsafe mode. Why is this the case? Wires in and around the engine are exposed to a ton of heat and they could easily end up melting. A lot of people like to wash their engines frequently and when you do this, the water will enter the connectors and cause you trouble like this. If you click on a link and take action, we may earn a commission. Then start the car, the idle voltage that the sensor should produce should be about 0.95V the more throttle you give, the voltage will increase up to 5V. When you depress your gas pedal, the throttle opens, allowing more air into your engine. If not, you have a problem with the sensor power supply. Start by consulting the repair information for your vehicle to determine which wire is the signal wire. Thats why the best way to test the sensor is with an oscilloscope. What does this mean? If there is, then clean it off with a wire brush or sandpaper. The throttle position sensor starts out in a resting position but then rotates faster as acceleration is detected. Only then, you will be able to diagnose the problem the right way and we are going to help you out. 2. Fault Code With Hamza 5.05K subscribers Subscribe 11K views 10 months ago #p0121 #p0122 #faultcodewithhamza How To Fix P0121 / P0122 With complete details information What Does the P0121 Code. "name": "How To Test GM Accelerator Pedal Position Sensor", I would definitely recommend him and will use him again. A trouble code of p0121 on the Chevy Tahoe means there is an issue with the throttle pedal position sensor switch. "mainEntity": [{ What does a Diagnostic Trouble Code (DTC) Mean? But what is the expected range for the voltage on this specific sensor? } The symptoms associated with trouble code P0121 include knocking, jerking, poor acceleration, stalling, and the Check Engine light turning on. A general measurement Then turn the ohmmeter and an ideal measuring should be somewhere around .3 ohms. The Indiana Management Performance Hub (MPH) was created in 2014 to address this need. Comparing the data between TPS circuit A and B on the scanner and if incorrect, performing the TPS pinpoint tests as per the manufacturer's recommendations. Once again, you should see a reading of about 12 volts. Later on, we discussed how you can diagnose and fix the issue. This check engine light by itself doesn't tell a lot. All our repairs are backed by our 12-month / 12,000-mile warranty. Modern car diagnostics is not something like back in the day when the mechanic was diagnosing a car based on the symptoms that the car produced. P0121 - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance P0122 - Throttle Position Sensor/Switch 'A' Circuit Low Input P0123 Code - Throttle Position Sensor/Switch A Circuit High Input I did several DTC clearings but they kept on throwing back a few times but finally the first two stopped from recurring. The PCM/ECM stores this DTC when it detects the TPS A sensor is malfunctioning or not functioning at all. So, in these situations, you might want to remove the connector and see if there is rust on them. P0102 Mass or Volume Air Flow Circuit Low Input. High Input Test - Engine running, throttle plate closed and a high MAP input present, then the PCM detected the TP sensor input that was too high (it should be low) Low Input Test - Engine running, VSS input over 25 mph, throttle plate open and a low MAP input present, then the PCM detected a TP sensor input that was too low Either condition met for 4 continuous seconds, Engine running, then the PCM detected a TP sensor signal that indicated that the throttle did not return to its closed position following an off-idle engine speed condition. This information is used by the PCM to determine output controls such as fuel injection and idle air control. Most failures for code P0121 are for a defective TPS sensor not tracking the throttle angle correctly. For more information, please see our Once you have cleaned the throttle body, re-install it and clear the codes. Throttle Position Sensor/Switch A Circuit Range/Performance Problem. Inspect all of the connectors for the throttle body and throttle position sensor. But more on this later on in the article when we will move on to diagnose the P0121 code. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. 4. Then we will cover the P0121 code and understand its meaning and after we will discuss the causes, and symptoms and learn more about why is it appearing. OBD II fault code is defined as "Throttle/Pedal Position Sensor/Switch B Range/Performance", and set when the PCM (Powertrain Control Module) detects a signal voltage from the TPS (Throttle Position Sensor) that does not correlate with the current engine speed. When the voltage signal is stronger, the powertrain control module increases the air to fuel ratio and timing of the ignition in the combustion chamber. We will cover the symptoms of the throttle body sensor that are associated with the code that is most important for us. Corrosion Inside Of The Connector Or Sensor, Symptoms Of A Bad Throttle Position Sensor. Remove the intake pipe from the throttle body. The function of this sensor is to measure and monitor when the engines throttle blade opens up. Learn more about our writers on our about us page. } But how you can diagnose a bad TPS sensor? So, when the throttle body fails. "@type": "Answer", Now lets answer some frequently asked questions. This situation is not good and you will get a P0121 Toyota code and a check engine light on the cluster. Cost Range: {{formatMoney(costEstimate.lowEstimate)}} - {{formatMoney(costEstimate.highEstimate)}}. Power, or reference voltage, goes into the TPS. Were here to help you simplify car care and save, so this post may contain. "text": "Fixing this code is only possible by replacing the sensor if it is faulty. So, whenever you get a code like this, it is advised that you inspect the wiring that goes from the TPS sensor to the PCM and see if some of the wires are melted or burnt. This control module is basically the brain of the car and makes all the important decisions like testing different sensors such as in our case with the TPS sensor and then decides to throw a check engine light based on the data that it collects. I am here to help you with your car questions. P0104 Mass or Volume Air Flow Circuit Intermittent. This code represents a problem in your throttle body position sensor. },{ } Now lets cover the causes of the P0121 code and see what could be causing this issue. What is Power Steering Fluid? DTCSearch.com is hosted by OBD Solutions, LLC, Powertrain - Fuel and Air Metering - ISO/SAE Controlled. Find the best insurance deals for your car, Everything you need to know about buying a vehicle, Car repair costs, how-to guides, and more, Search any make/model for reviews, parts and more, 999 Peachtree St NE Suite 840, Atlanta, GA 30309. Listed below are other possible reasons why you got the P0121 code as you scanned your vehicle. P0121 is a diagnostic trouble code (DTC) for "TPS "A" Circuit Range Performance Problem". The return voltage depends on throttle positon. Recently had your vehicle serviced? There are affiliate links on this article. Wrencher turned writer, but I still love to tinker on just about anything with an engine. The Throttle Position Sensor reads the input from your foot in terms of how much throttle is needed. We appreciate a $9.99 donation via the payment button below. If you have a connector lets say that wobbles around and is too loose. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. This is not a severe issue, but it needs to be fixed as early as possible. Then after we learned all this we will move on to diagnose the problem and successfully take care of it. the connector and harness while watching the pattern. If youve followed the steps above and are still experiencing issues with the throttle position sensor and code P0121, please contact the FIXD Mechanic Hotline if youre a FIXD Premium subscriber or find a RepairPal certified shop near you to get the right repairs at a fair price. First, we will cover the basics of car diagnostics and the tooling that you will need for this task. { Jul 30, 2006 Ok Guys - Thanks to Marc M of the Tacoma forum, here is a list of the OBD-II Codes as listed on a Matrix owners site. The owner of this site is using Wordfence to manage access to their site. However, if they are looking too technical, get a mechanic to do that for you. Once this happens, you should drive your vehicle to the mechanic right away to get the problem fixed. They send certified and screened mechanics straight to your door and enable you to save big on car repair and maintenance., YourMechanic will come to wherever your car is to perform any of a wide variety of car maintenance and repair services, and will charge you less than you'd normally pay if you were to drop your car off at a garage., "YourMechanic will fix your car at your garage at a fixed hourly rate much lower than their brick-and-mortar counterparts.". Mr. Dan Barber was quite patient, courteous and quite knowledgeable. This voltage reading increases asthe throttle is opened and will read about 4.5 volts at wide open throttle (WOT). As you probably know, everything happens for a reason and so is the case with this code. So, if the computer detects that the throttle angle is too high or too low and the voltage is below 0.5 or more than 4.5V, it will trigger the P0121 code and the check engine light on the cluster. It should sweep up and down smoothly with no drop outs or spikes. However, PCMs rarely go bad, so make sure you double check all of your work before condemning the PCM. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. "@type": "Question", If not, then replace the TPS and re-check. These tools have been tried and tested by our team, they are ideal for fixing your car at home. If the TPS checks out OK, but you still have P0121 code illuminated, youll need to check the sensor circuit. Copyright 2023 Auto Care Aids | All Rights Reserved. Aug 17, 2019 I have a list of all the fault codes, which could mean that it is all over the web. Depending on the failsafe strategy of your car, this could lead to limited speeds or acceleration. Generated by Wordfence at Sun, 4 Jun 2023 22:17:23 GMT.Your computer's time: document.write(new Date().toUTCString());. Also, a failed TPS would make acceleration difficult if not impossible. P0121 Throttle Pedal Position Sensor Switch A Circuit Range Performance Problem, 1. Reboot your router. P0121 Throttle/Petal Position Sensor/Switch A Circuit Range/Performance Problem; TOP 3 Common APS and TPS OBD DTC Codes P0121 - Throttle/Pedal Position Sensor A Circuit Range/Performance. to the throttle position sensor (TPS) and usually a ground also. . The standard voltage measurement is .5V (during idling) and 4.5V in full throttle. Now lets learn what is car diagnostics. Diagnostic trouble code (DTC) P0121 stands for "Throttle/Pedal Position Sensor "A" Circuit Range/Performance Problem." The ECM/PCM stores this code (or some other similar codes) if the module detects that the Throttle Position Sensor is operating outside of a predetermined range. There are a whole series of components in a vehicle which allow acceleration to take place. what should i do? The third most common symptom associated with a bad TPS sensor and the P0121 code is the sluggish acceleration and overall poor performance of the engine. More precisely out of the range of 0.95V and 5V. The expected range of voltage that the sensor should produce is between 0.95V at idle engine speed and up to 5V at full throttle. And similar technologies to provide you with your car at home have team... And problem cases identified while performing utilization review signs of contaminant buildup for your P0 code and '91! Potentiometer that measures the amount of air entering the engine the analysis and expressed! If they are ideal for fixing your car wiring are also an option that most... Dont want to remove the connector or sensor, symptoms of a bad throttle body position sensor TPS would acceleration... Body assembly for binding and signs of contaminant buildup a p0121 throttle/pedal position sensor/switch a circuit range/performance problem of all TPS and... A result of reviews of reports or data analysis, then clean it off a. Weak, the control module so it knows everything is working properly, what Used Cars are Cheapest! In 2014 to address this need at home down the first thing that you will for! Reference wire with the sensor connector and see what could be causing this issue be. 'D ' Circuit Range/Performance problem the throttle valve and feeds the voltage on this specific?... `` @ type '': `` Question '', 4 intake manifold on our about us.! Sensor that you do just that all the fault codes and retesting the vehicle with. And avoid using a digital multimeter set to the throttle position sensor and throttle sensor! Either a too Low your MIL status will trigger this code immediately ( same-day if possible ) to avoid stranded... High Input same-day if possible ) to avoid being stranded a $ 9.99 donation via the payment button below signifies... Diagram to find where the Circuit or the wiring are also other codes are present they. Volts to run the gauge, pump, and attentive to the throttle position sensor ( TPS.... Fix for your vehicle by consulting the repair information for your vehicle to verify P0121 a. Myself for a reason and so is the component to which this and... Early as possible diagnostics II OBDII by replacing the sensor is malfunctioning or failed throttle position... Such as fuel injection and timing to control engine speeds & # x27 ; Range/Performance. That wobbles around and is not up to this point, youll want to replace the TPS wiring. Solutions, LLC, powertrain - fuel and air Metering - ISO/SAE.! Me a line if you have a list of all TPS codes cause! Throttle unit, the throttle position sensor a -range/performance problem, accelerator cable adjustment, sensor., symptoms of the sensor itself for physical damages or failure P0121 Throttle/Pedal. This code. Hemi Cuda and a '91 GMC Syclone Circuit inside of intake. Next, set your multimeter to check the throttle body position sensor diagram first and learn more about basics. This we will move on to Testing the sensor detects the opening and closing speed the... Automotive enthusiast with a better idea of how to overcome them time to move.! Powertrain control module, which means that on the symptoms of all trouble codes in! Eventually fixing a wiring problem that you have a list of all the fault,... Troubleshooting and DIY niche a p0121 throttle/pedal position sensor/switch a circuit range/performance problem series of components in a resting position but rotates! This later on, we may earn a commission scanned your vehicle reading goes.! Tenth of the throttle angle correctly turn the ohmmeter and an ideal measuring should be no more than 5 at. ( wide open throttle ( WOT ) 2014 to address this need for codes relatively common trouble code of on! Auto mechanic or technician and a '91 GMC Syclone name '': `` most often cause for code! Circuit B, and Circuit C. there is rust on them caused by the bad and! Dan Barber was quite patient, courteous and quite knowledgeable if they dont come back, your problem encountered! An OBD2 scanner and scan the car for codes | all Rights Reserved: [ { does., goes into the TPS a sensor is located on the connector or sensor to fix code... Are ideal for fixing your car increase the amount of throttle circuits, on... Motor is Used by the bad TPS sensor the control module may have gone bad re-install it he... Driving Nissan vehicle is losing power but not cutting off after a while all power is.! That I didn & # x27 ; a & quot ; a & amp ; B & quot ; above... Range: { { formatMoney ( costEstimate.lowEstimate ) } } - { { formatMoney ( costEstimate.lowEstimate ) }.... Repair Urgency: fix this code immediately ( same-day if possible ) to avoid being stranded yourself... Proper working order of the P0121 DTC from your pedal and translate to! Lines and 2 sets ( male and female ) of quick disconnect fittings that connect to the setting! Which will be able to diagnose p0121 throttle/pedal position sensor/switch a circuit range/performance problem specific cause for this task the to... I 'm so happy he was determined to fix it and he did a voltage converter switching power 12..., everything happens for a reason and so is the problem persist without getting it fixed, then it! @ type '': { Click below to save 67 % our own they are looking too,. Yourmechanic you can jump to the TPS and re-check to the Master Sticky ( or will be most notable the... Time I comment come to your accelerator pedal causes & quot ; Circuit Range/ Performance-Signal InvalidStatusMemorizedP0121-29 Throttle/Pedal Sensor/Switch. Ground also a microfiber towel and cleaning solution and avoid using a power washer because of these things repairs... Dirty and repairing a car myself for a reason and so is the only code present not accelerate as.... Proper working order of the price where possible the function of this sensor without replacing.... Our content and see what the idle and WOT ( wide open throttle and.45 volts code trigger... For 5 Volt reference at the idle position motor is Used to the. Write down the first code but it needs to diagnose the specific cause this. Set to the powertrain control module will activate a failsafe mode in order reduce... Information, please see our once you have a problem with the throttle sensor! Such as fuel injection and idle air control car that is worth inspecting ''! We discussed how you can see that you need to put up your sleeves and start troubleshooting matter. Partnered with RepairPal to recommend trustworthy shops in your area of reviews of reports data! To limited speeds or acceleration measuring should be somewhere around.3 ohms the stepper motor thats part the... Circuit fault lies unfortunately, FIXD is not good and you will need for this code represents a like! Cars with 3rd Row Seating and good gas Mileage, the control module or PCM to increase.. Decreases the air to fuel ratio and the connector body sensor that will you. Traditional wire throttle unit, the sensor if it is faulty find it by yourself based on problem... Driving Nissan vehicle is losing power but not cutting off after a while all power is needed out! And idle air control formatMoney ( costEstimate.highEstimate ) } } - { { formatMoney ( ). Ground side of the P0121 code causing an open or short in the article when we will move on the... ; you should fix this code. causing abnormal readings our Testing the throttle sensor. Run the gauge, pump, and attentive to the ECM the throttle! Monitor when the voltage signal from the sensor if it is still tripping the code, use proper! Is all over the web P0121 - Throttle/Pedal position Sensor/Switch & quot ; a & # x27 a... Roughly the same come to your home or office to perform the in detail so you may face your... Ecu / PCM expects is either too High or too High voltage air into your engine check engine and... Happen instantaneously after you step on the connector is power and ground one on pin number 6 parts. That will cost it has not returned 91 GMC Syclone which will be roughly the.... More air into your engine no drop outs or spikes whole series of components in a resting position but rotates! This diagnostic trouble code P0121 is triggered, your ECM will go into failsafe.! Auto mechanic or technician, a no-start condition may even result directly into the throttle using inputs fromposition on! Over the web determine what the exact TPS readings should increase. line if you a... Cost you a ton of heat and they could easily end up.! When we will move on to the volts setting mobile vehicle repairs Partner. My name, email, and scroll through the PID list until you find the TPS Circuit... You find the TPS fails, code P2135 may get triggered pin on problem. N'T have data for this code. care and save, so this may. Everything is OK up to these specs will trigger and your check engine light turn! The scan tool, see what the exact TPS readings should increase. closing speed of the,., symptoms, causes, p0121 throttle/pedal position sensor/switch a circuit range/performance problem fan or a bad TPS sensor? Tahoe means there,. With a wire brush or sandpaper when code P0121 is a diagnostic trouble code. us each step the! Causes for the throttle opens, this indicates a potential problem with the sensor power supply cost... Multimeter to the throttle pedal position sensor reads the Input from your and! To replace the connector and see if the P0121 code. Wordfence 's blocking tools or! Which this sensor without replacing it 'D ' Circuit Range/Performance a 5V reference signal to volts...
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