Cylinder 9 Above Knock/Combustion Vibration Sensor Threshold

Where it lives

For P2344, the part to look at first is the sensor named here. The description of P2344 puts it on cylinder 9.

Check these first

• Low octane fuel knocking in cylinder 9
• Carbon deposits raising cylinder 9 compression
• A faulty knock sensor misreporting cylinder 9
• Over-advanced ignition timing for cylinder 9
• A fouled cylinder 9 spark plug

What to do next

1. Read the knock sensor data on a scan tool
2. Check for other misfire or knock codes
3. Fill with the recommended octane fuel
4. Inspect the cylinder 9 spark plug and ignition coil
5. Test the knock sensor circuit if no knock is audible
6. Clear the code and retest

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