P0764

P0764

Solenoid Valve X

Diagnostic conditions:
- Engine running
- Selector lever in position D

Possible fault causes:
- Short circuit to B+/ground/between lines or open circuit
- Solenoid valve X faulty (see fault text)
- Tiptronic control module faulty

Fault reaction:
- For fault codes P0750 and P0755:
- A warning is displayed in the instrument cluster.
- 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.

- For fault code P0760:
- 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.