Knock Sensor
WARNING: This page is about a different car, the 1991 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
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.
Knock sensor problems can also set fault codes 52 and 53. For code charts, see TESTS W/CODES article in the ENGINE PERFORMANCE Section.