P0219

P0219

Engine Overspeed

Diagnostic conditions:
- ATF level OK
- Selector lever position D or M
- Test drive

Possible fault causes:
- ATF level too low or too high
- Hydraulic control unit faulty
- Transmission faulty (impermissible downshifting)
- Engine speed exceeding permissible maximum
- Engine speed transmitted incorrectly by DME

Fault reaction:
- A warning is displayed in the instrument cluster.
- The transmission is shifted into conditional limp home mode, i.e.:
- after fulfilling specific conditions (e.g., going below a speed threshold of 80 km/h (50 mph) in 5th gear), the transmission is shifted into mechanical limp home mode, i.e.:
- The pressure adjuster and solenoid valves are switched off.
- This opens the torque converter lockup clutch and 4th gear is firmly selected.
- The gear display shows 4th gear.