P0329: Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)
Possible Causes
- Faulty ignition coil or spark plug
- Fuel delivery issues (clogged injector or low pressure)
- Wiring or connector issues in the ignition circuit
- Vacuum leaks or intake manifold issues
- Faulty engine control module (ECM)
Diagnosis and Repair
- Use a scanner to identify the misfiring cylinder
- Inspect spark plugs and ignition coils for wear or damage
- Check fuel injector operation and fuel pressure
- Inspect wiring and connectors for faults
- Replace faulty components (spark plugs, coils, or injectors)
- Clear codes and perform a test drive
Related Error Codes
See also: P0300, P0301, P0302, P0303, P0304
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