How do you calibrate a pedal sensor?
To calibrate the accelerator pedal assembly: To recalibrate the ECM and accelerator pedal, the ignition switch must be in the ON position and then the accelerator pedal must be slowly and fully depressed from idle to full throttle. Repeat the procedure three times.
What is the p0121 code for throttle pedals?
P0121 code definition. Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem.
What are symptoms of the p0121 OBD-II trouble code?
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. What are the symptoms of the P0121 code?
When does code p0121 trigger in a PCM?
Code P0121 triggers when the Throttle/Pedal Sensor/Switch “A” Circuit sends irrational data to the PowerTrain Control Module or PCM.
How to test the GM accelerator pedal position?
The Fluke 115 digital multimeter has a bar graph… to see it, check out this article: Abe’s Multimeter Recommendation. You can use an analog multimeter too. Generic scan tool. As I mentioned above, you don’t need to use a generic scan tool to take advantage of the test info in this tutorial, but it does come in handy to read any trouble codes.
What does p0121 GMC mean on a car?
P0121 GMC Meaning The throttle position sensor (TPS) responds to the accelerator pedal movement. 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).
What causes p2135 code throttle / pedal Pos switch?
Potential Causes of P2135 DTC. It’s been my experience that the wiring connector or “pig tail” on the throttle body gives problems in the form of a poor connection.The female terminals on the pigtail corrode or pull out of the connector. Possible bare wire on pigtail shorting to ground.
How much does it cost to diagnose a p0121 code?
Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The cost of diagnosing the P0121 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour. When is the P0121 code detected?
How can I check the accelerator pedal sensor?
Inspect the top cover on the throttle body for cracks or warping. If any are present, call the dealer and ask if they sell just the top cover. If not, replace the throttle body. With a voltmeter, probe the accelerator pedal sensor. It will have 5 volts for reference and next to it a varying signal. Turn the key on and slowly depress the pedal.