Pressure Sensor 2, Short Circuit To Ground Or Open Circuit

P0846

Diagnosis information - PDK

Pressure sensor 2, short circuit to ground or open circuit

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
- The following fault is not detected: P1706
- The following fault is not detected: P1707

Possible fault causes
- Short circuit to ground or open circuit in line between pressure sensors and PDK control unit
- Check sensor ground if the following faults are entered additionally: P172F, P0711, P0712, P0841, P0843, P0846, P0848, P181A

Fault setting conditions
- Measured pressure < threshold value (0.35 bar)

Fault effects
- Only gears 1, 3, 5 and 7 are possible
- Gear held and no pressure control
- Start enable only in position P
- No pressure control
- Clutch pressure < holding threshold 8.1 bar and torque limitation
- Transmission limp-home indication in instrument cluster control unit