Possible Causes
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
A tuned accelerometer on engine that converts engine vibration to an electrical signal. PCM uses this signal to determine presence of engine knock and retard ignition timing as necessary. Possible causes are:
- Knock sensor circuit short to ground.
- Knock sensor circuit short to power.
- Open knock sensor circuit.
- Damaged knock sensor.
- Damaged PCM.