P0329: Knock/Combustion Vibration Sensor A Circuit Intermittent
What to do
Expect occasional flat spots. Report that the fault is intermittent.
What this code means
Sensor A's signal is intermittent. Given the sensor's position bolted directly to the block, vibration is constant and a marginal connector or a cracked sensor body will come and go with engine temperature and load.
Likely causes
Start here
- Intermittent wiring fault · moderate
- Corroded or loose connector · easy
- Faulty knock sensor · moderate
Less common
- Incorrect knock sensor mounting torque · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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