Knock Sensor: Service and Repair

Knock Sensor:

CAUTION: Disconnect the battery ground strap. Limited space between the alternator electrical connection and the knock sensor mounting bolt may cause an accidental short between the two components.


1. With the ignition "Off", disconnect the knock sensor electrical connector.
2. Remove the knock sensor mounting bolt and lift out the knock sensor. Take note of the harness routing.
3. Reinstall the knock sensor and CAREFULLY torque the retaining bolt to specification, (engine cold, 15 - 18 ft. lbs.).

NOTE: Verify that the terminals for the knock sensor harness connectors are of the same material. Replacement knock sensors have gold plated terminals. Earlier original equipment sensors have alloy plated terminals. When a knock sensor with gold terminals is installed, be sure to replace the matching harness connector with gold terminals.

4. Reinstall the battery ground strap.