2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 380
- Hydraulics faulty (hydraulic control unit)
- Transmission faulty
Fault setting conditions
- 7. gear cannot be disengaged
Fault effects
- Gear held
- No gear pre-selection
- Transmission limp-home indication in instrument cluster control unit
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
Pressure Sensor 1, Short Circuit To B+
P181A
Diagnosis information - PDK
Pressure sensor 1, 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 saved: P1706
- The following fault is not saved: P1707
Possible fault causes
- Line between pressure sensor 1 and PDK control unit faulty
- Pressure sensor 1 faulty
- PDK control unit faulty
- Clutch 1, measured oil pressure > 21 bar
Fault setting conditions
- Pressure sensor 1, signal > 4.5 V