P0326 Knock/Combustion Vibration Sensor A Circuit Range/Performance
What does P0326 mean?
P0326 — Knock/Combustion Vibration Sensor A Circuit Range/Performance. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects knock/combustion vibration sensor a circuit range/performance. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0326
- Faulty knock sensor
- Loose or over-torqued sensor bolt
- Damaged knock sensor wiring
- Engine noise or vibration triggering false knock
- Sensor read-out-of-range
How to fix P0326
- Inspect the knock sensor wiring and connector
- Verify the sensor bolt torque and mounting surface
- Listen for abnormal engine noise that mimics knock
- Test the sensor's output with a scope during light throttle
- Replace the sensor if its response is out of spec