2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 354
- Reverse gear is engaged instead of 2nd gear
- No shift rod moves
NOTE: The individual detection times are temperature-dependent (cold 2 s, warm 1 s)
Fault effects
- Gear held
- Only gears R, 3, 5 and 6 are possible
- Transmission limp-home indication in instrument cluster control unit
Synchro 3rd Gear Not Engageable Or Gear Skip
P177C
Diagnosis information - PDK
Synchro 3rd gear not engageable or gear skip
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 faults are not detected: P1731, P1732, P1733 or P1734
- The following faults are not detected: P1706 or P1707
- Alternative measure HSS3_OFF not active
- Automatic gearshift without gear preselection is active
Possible fault causes
- Hydraulics faulty (hydraulic control unit)
- Transmission faulty
Fault setting conditions
- Target gear 3rd gear, actual gear is disengaged before pressure adjusters 5/6 are activated
- 1st gear is engaged instead of 3rd gear
- No shift rod moves
NOTE: The individual detection times are temperature-dependent (cold 2 s, warm 1 s)
Fault effects
- Gear held
- Only gears 1, 2, 4 and 7 are possible
- Transmission limp-home indication in instrument cluster control unit
Synchro 4th Gear Not Engageable Or Gear Skip
P177C
Diagnosis information - PDK
Synchro 4th gear not engageable or gear skip
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 faults are not detected: P1731, P1732, P1733 or P1734
- The following faults are not detected: P1706 or P1707
- Alternative measure HSS3_OFF not active
Possible fault causes
- Hydraulics faulty (hydraulic control unit)
- Transmission faulty
Fault setting conditions
- Target gear 4th gear, actual gear is disengaged before pressure adjusters 5/6 are activated
- 6th gear is engaged instead of 4th gear
- No shift rod moves
NOTE: The individual detection times are temperature-dependent (cold 2 s, warm 1 s)
