September 30: LEMON manuals is back up on a temporary server! Slowness is possible

Knock Sensor

Probable causes of knock sensor problems include the following:

Open or short in knock sensor circuit.
Knock sensor (looseness etc.).
Knock control in ECU is faulty.

On models equipped with knock sensor, diagnosis is in Code 52 and Code 53 charts. For code charts, see TESTS W/CODES article in the ENGINE PERFORMANCE Section.