P0664

P0664

Electric tuning flap

Diagnostic conditions
- Power supply voltage > 7 V
- Engine start-up and subsequent engine running > 10 s

Possible fault causes
- Short circuit to B+/ground or open circuit in the control line
- Open circuit of power supply to tuning flap solenoid valve
- Tuning flap solenoid valve faulty
- DME control module faulty