Trouble code P0121 is signaled when your powertrain control module receives an incorrect signal from your throttle position sensor, or TPS. Your TPS is connected to a reference wire with five volts and typically a ground wire.

P0121 trouble code stands for “Throttle Position Sensor/Switch “A” Circuit Range/Performance Problem.” What does the P0121 Code Mean? The P0121 code indicates that your powertrain control module (PCM) has detected that your throttle position sensor is operating outside of a programmed range.

2022年3月3日 · When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position “A” circuit’s expected output voltage has either gone above or below the sensor’s expected range. When code …

2022年12月13日 · When code P0121 appears, it hints that the Engine Control Module (ECM) has detected that the predicted output voltage of the TPS ‘A’ circuit has gone above or below the sensor’s expected range. When the code activates, your car’s ECM will enter failsafe mode.

2021年8月6日 · P0121 stands for “Throttle/Pedal Position Sensor “A” Circuit Range/Performance Problem.” It’s when the modules detect that the throttle position sensor is operating outside a predetermined range. The code is usually caused by a defective throttle position sensor, a faulty TP sensor circuit, or issues with the throttle body.

A Chevy P0121 Code Silverado is a “Throttle Position (TP) Sensor 1 Performance.” Common causes include a faulty throttle body, bad throttle position sensor, and wiring. Symptoms include the engine running badly, rapid RPM changes, and possibly limp mode.

The P0121 code triggers when the “A” and “B” circuits of your vehicle’s throttle position sensor don’t match, which can be a severe problem, activating your car’s failsafe mode and limiting engine performance.

2022年5月20日 · What are common symptoms of OBDII code P0121 in a Chevrolet related to the throttle position sensor? The common symptoms include issues with acceleration, reduced engine power, stalling, rough idling, and potential difficulty shifting gears.

Symptoms of a P0121 trouble code could include: Malfunction Indicator Lamp (MIL) illumination (Check Engine Light or Service Engine Soon light) Intermittent stumble on acceleration or deceleration; Blows black smoke on acceleration; No start; Causes. A code P0121 may mean that one or more of the following has happened:

2016年6月3日 · What are the symptoms of code P0121 ? Symptoms consistent with a faulty throttle position sensor include: hesitation or stumbling upon acceleration, unstable idle, and an illuminated check engine light. In some cases, a no-start condition may even result. How do you troubleshoot code P0121 ? Visually inspect the sensor and its wiring