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P0652, P0653

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE lamp on. Car in limp-home mode.

P0652, P0653


P0652 Voltage Supply Group 2. Short to Ground.

P0653 Voltage Supply Group 2. Short to B+.


Fault symptoms


CHECK ENGINE lamp on.

Car in limp-home mode.


Conditions

The following conditions apply for this DTC:


P0652: The power supply to pedal position sensor 2, the atmospheric pressure sensor or mass air flow sensor is shorted to ground. The output voltage is below 4.6 V.

P0653: The power supply to pedal position sensor 2 is shorted to battery voltage. The output voltage above 5.4 V.


Diagnostic help

The engine speed is set to a fixed 1400 rpm. The engine will not react to accelerator depression so long as the fault persists. The substitute value for air mass is 800 mg/combustion, and for atmospheric pressure 0.7 bar.

Note

A fault in the control module female connector can cause a trouble code. Check the contact for a bent pin, oxidation and tightness of pins. See Difficult faults in PSG16 despite trouble code