Causes and Fixes P0121 Code: Throttle/Pedal Position Sensor “A” Circuit Range/Performance Problem

How to fix P0121 engine Code: Throttle/Pedal Position Sensor “A” Circuit Range/Performance Problem. A P0121 is a generic OBDII code for an issue with the Throttle/Pedal Position Sensor, but the definition may be different depending on the manufacturer. Example: Throttle Position Sensor Voltage Does Not Agree with Manifold Air Pressure The throttle position (TP) sensor measures how much the Throttle Body plate butterfly is open. On some vehicles, the code may point to a problem with the accelerator pedal position sensor rather than the TP sensor. Symptoms of a Bad Throttle Position Sensor and How See if it Has Failed Video Possible Causes of a P0121 Code: Bad Throttle Position Sensor Wiring Open Short Bad Throttle Body Bad Sensor (MAF/MAP) Bad Accelerator Pedal Position Sensors By using this information user assumes all risk of use. www.backyardmechanic.org