Diagnostic Aids

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions listed below may cause a knock sensor DTC to set:

Sensor damage.
Knock sensor and engine mounting surface burrs, casting flash, and foreign material.
Close proximity of hoses, brackets, and engine wiring.
Loose brackets.
Loose or broken accessory drive belts, brackets, components.
An engine mechanical condition. Refer to Symptoms - Engine Mechanical .