Pressure Sensor 1, Short Circuit To Ground Or Open Circuit

P181A

Diagnosis information - PDK

Pressure sensor 1, 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, P181B

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

Fault effects
- Only gears 2, 4 and 6 are possible
- Protective function: gear held and no pressure control
- Start enable only in position P
- No pressure control
- Clutch pressure < holding threshold DH-V (8.1 bar) and torque limitation
- Upward limitation of system pressure
- No emergency program diagnosis
- Only gears 2, 4 and 6 possible
- White transmission limp-home indication in instrument cluster