OBD-II FAULT CODE
P0328
Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0328.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- Faulty knock sensor
- Wiring fault
- Engine mechanical noise
- Incorrect fuel octane
- High signal voltage
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Inspect sensor wiring and mounting
- Check for engine noise and correct fuel
- Check sensor ground and signal circuit for short to voltage
- Repair wiring, replace sensor if confirmed, address mechanical noise/fuel issue
- Repair ground/signal circuit or replace confirmed faulty sensor
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.