Causes and Fixes P2127 Code: Throttle / Pedal Position Sensor / Switch “E” Circuit Low

How to fix a P2127 Code: Throttle / Pedal Position Sensor / Switch “E” Circuit Low A P2127 code is set when the computer (ECM/PCM) detects that the voltage from the throttle position or pedal sensors is low. The sensor on the throttle body is called the Throttle Position (TP) Sensor. The sensor on the gas pedal is called the Accelerator Pedal Position (APP). Some vehicles have a Throttle Body Relearn procedure if the sensors are replaced. Check the Throttle/Pedal Position Sensor voltage with the key on but engine off. There needs to be a steady 5-volt reference voltage and a good ground. Possible Causes of a P2127 Code: Dirty Throttle Body Bad Throttle Position (TP) Sensor Bad Accelerator Pedal Position (APP) Sensors Wiring Open or Short Bad Computer (ECM/PCM/TAC) By using this information, the user assumes all risks of use.