Transmission line pressure is below the expected range.
SYMPTOMS
- Check-engine light
- Slipping
- Harsh shifts
- Limp mode
LIKELY CAUSES
- Low/degraded fluid
- Failed pump
- Stuck pressure solenoid
- Internal leak
DIAGNOSIS STEPS
- Check fluid level and condition
- Read TCU sub-codes
- Measure line pressure in live data
RELATED PARTS
- PDK fluid
- Mechatronic unit