Cylinder 3 Above Knock/Combustion Vibration Sensor Threshold

Where it lives

For P2338, the description names the sensor as the part involved. The description of P2338 puts it on cylinder 3.

Check these first

• Low octane fuel spark knocking in cylinder 3
• Carbon buildup on the cylinder 3 piston
• A knock sensor misreading vibration on cylinder 3
• Over-advanced ignition timing
• A fouled cylinder 3 spark plug

What to do next

1. Read the knock sensor and cylinder 3 knock counts on a scan tool
2. Check for other ignition or fuel codes
3. Use the fuel octane the maker specifies
4. Inspect the cylinder 3 spark plug and coil
5. Test the knock sensor circuit if the knock is not audible
6. Clear the code and retest

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