Test Point 13 - Knock sensor 1
TEST POINT 13 - Knock sensor 1 - Fault code 1_31Possible Causes, Elimination, Remarks
Mounting of knock sensor (observe torque and type of screw).
Check wiring harness and plug connection in accordance with wiring diagram.
Reconnecting the plugs helps to eliminate contact resistances.
Replace knock sensor.
If the knock sensor is faulty, ignition timing is retarded by 6° on the crankshaft at a certain engine load.