Posts Tagged: APP Sensor

P2138 trouble code

Fix code P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation If your vehicle has set a P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation trouble code, read this description to find out what it means. Many accelerator pedal position sensors actually have two sensors inside. The computer sends a 5-volt reference signal to both sensors and sees the return ground as a sign that the reference signal is reaching the sensors and returning back to the computer. A third wire carries that actual position signal. To test the APP, the … Read More