2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 383
Fault effects
- Engaged gear is held until vehicle stops
- Moving off possible only in 3rd gear
- Only gears 1, 3, 5 and 7 are possible
- Start enable only in selector lever position P
- Transmission limp-home indication in instrument cluster control unit
Pressure Sensor 2, Short Circuit To Ground Or Open Circuit
P181B
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
Pressure Regulator 2 (Clutch), Short Circuit To B+
P181B
Diagnosis information - PDK
Pressure regulator 2 (clutch), 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
- The following fault is not detected: P1831
- The following fault is not detected: P1839
Possible fault causes
- Line between pressure regulator 2 and PDK control unit, short circuit to B+
- Pressure regulator 2 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, actuator solenoid R/P: current consumption = 0 mA
- Pressure regulator 2, control current > 850 mA
Fault effects
- Pressure regulator 2 switch-off
- Engaged gear is held until vehicle stops.
- Moving off possible only in 3rd gear
- Transmission limp-home indication in instrument cluster control unit
