A generic flag that the PDK transmission control unit has stored one or more of its own fault codes and requested the check-engine light. P0700 itself carries no detail — a Porsche-capable tool (PIWIS/Durametric) reads the manufacturer sub-code that identifies the actual fault.
SYMPTOMS
- Check-engine light
- Possible "Gearbox fault" message
- Limp mode
- Harsh or erratic shifts
- Possible loss of a gear
LIKELY CAUSES
- Mechatronic/solenoid pack fault
- Clutch pressure sensor fault
- Degraded PDK fluid
- Wiring fault
- Clutch wear
DIAGNOSIS STEPS
- Read TCU-specific sub-codes with a Porsche-capable scanner
- Check PDK fluid level/condition and service history
- Inspect wiring and connectors
- Address the specific sub-code
RELATED PARTS
- Mechatronic unit
- PDK fluid
- Solenoid pack
- Clutch pressure sensor