Pressure Sensor 3, Short Circuit To B+

P0871

Diagnostic information - PDK

Pressure sensor 3, short circuit to B+

Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.

- Ignition on

Possible fault causes
- Line between pressure sensor 2 and PDK control unit faulty
- Pressure sensor 2 faulty
- PDK control unit faulty

Fault setting conditions
- Pressure sensor 3, signal > 4.5 V

Fault effects
- Engaged gear is held until vehicle stops
- Start enable only in selector-lever position P
- Transmission limp-home indication in instrument cluster control unit