Test Point 7 - Knock Sensor I

TEST POINT 7 - Knock sensor I - Fault code 2_31

Possible Causes, Elimination, Remarks
Knock sensor I: sensor signal is not plausible. Check:
- Knock sensor mounting (note tightening torque and type of screw).
- Wiring and plug connections according to wiring diagram Reconnect the sensors to eliminate contact resistance.
- Is any coolant or other fluid present at the knock sensors?
- Renew knock sensor.

If the knock sensor is faulty, the ignition will be retarded (safety circuit).