Knock Sensor

The knock sensor (detonation sensor) is located on the lower left side of the cylinder block just above the oil pan. The knock sensor picks up detonation vibration from the engine and converts it to an electrical signal for use by the ECU.

The ECU uses this information to determine when a change in ignition timing is required. The knock sensor allows for engine operation on either "premium" unleaded or "regular" unleaded fuel. When knock occurs, the ECU retards the ignition timing in one or more cylinders until detonation is eliminated.