Definition of P2127 code:

The P2127 code means that the throttle or pedal position sensor switch E has a low input. The pedal position sensor is a sensor found on the gas pedal. The sensor tells the ECU when the gas pedal is depressed and how far it is depressed. When the ECU detects a low input from the pedal, it will trigger the Check Engine Light and the code P2127.The Check Engine Light will be displayed on the dashboard. With the Check Engine Light, a failsafe mode may be set to prevent damage from being done to the vehicle.

What causes the P2127 code?

1. TPS not mounted securely
2. TPS circuit short to ground or another wire
3. Faulty TPS
4. Damaged computer

What are the symptoms of the P2127 code?

Symptoms may include black smoke at start up, poor or no acceleration, a no start condition, misfire at idle, start and stall If this code is stored, and a service engine soon lamp has not yet been illuminated, the code may be shown as a pending code.

Common mistakes when diagnosing the P2127 code:

Symptoms and stored codes that are present as a reaction to a communication failure are often misdiagnosed and repaired as the cause of the problem. Obviously, this leads to an unsuccessful repair. Engine misfire codes, lean exhaust codes, fuel injector codes, and virtually any other drivability or transmission code that is accompanied by a controller communication code can potentially be a pitfall for misdiagnosis. Follow the rule that says to diagnose codes in the order in which they are stored and you will improve your chances for a successful diagnosis.

What repairs can fix the P2127 code?

1. Repair or replacement of the wiring harness for the throttle position sensor or pedal position sensor

2. Throttle/Pedal position sensor E replaced

3. Fixing the intermittent electrical connection

4. ECM replacement if required