Knock/Combustion Vibration Sensor A Circuit High

Where it lives

For P0328, the sensor sits on the circuit this code reports. The description of P0328 reports a fault at the sensor.

Check these first

• A faulty knock sensor A on bank 1
• A short to power on the sensor A circuit
• Corrosion at the sensor A connector
• An engine mechanical fault causing knock
• A faulty ECM input

What to do next

1. Read knock sensor A on a scan tool
2. Inspect the sensor A connector and wiring
3. Check the sensor A circuit for a short to power
4. Listen and scan for engine knock under load
5. Replace knock sensor A if the signal stays high
6. Clear the code and retest

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