Knock/Combustion Vibration Sensor B Circuit Range/Performance

Where it lives

For P0331, the description names the sensor as the part involved.

Check these first

• A faulty knock sensor B on bank 2
• Wiring or connector faults on the sensor B circuit
• Fuel quality or contamination causing knock
• An ignition fault causing engine knock
• A faulty ECM input

What to do next

1. Read knock sensor B on a scan tool
2. Inspect the sensor B wiring and connector
3. Check the fuel quality and octane
4. Check the ignition system for misfires
5. Replace knock sensor B if it reads wrong
6. Clear the code and retest

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