15 BMW 528 reported fault code 103 102 accelerator pedal module short circuit to ground. What's the problem?

This fault code indicates that the signal voltage of electronic accelerator pedal position sensor A is higher than the calibrated maximum value (4.65v). The fault causes include the short circuit of the sensor signal circuit to the positive electrode, the fault of the sensor itself or the fault of the electronic control module (PCM or ECM).

If both circuits are faulty, the engine ECU will detect abnormal signal voltages from the two sensor circuits and interrupt the throttle control. At this time, the vehicle can travel within the idle range of the vehicle.

Important points to note:

1.ECU and sensor must be moisture-proof. It is not allowed to damage the sealing device of microcomputer or sensor, and it is not allowed to wash it with water. The ECU must be protected from violent vibration.

2. In the electronic control system of automobile, most faults are not ECU, sensors and executive parts, but connectors. Connectors often have poor contact or instantaneous short circuit due to looseness, desoldering, ablation, rust, dirt and other reasons, so when there is a fault, do not replace the electronic device easily, but check the condition of the connector first.