OBD-II code · Powertrain (generic)
P0326 Knock/Combustion Vibration Sensor A Circuit Range/Performance
Knock sensor A signal is in electrical range but plausibility check fails — typically a loose mounting, wrong torque, or sensor element drift.
Is it safe to drive with P0326?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor loose — incorrect torque
- PossibleSensor element drift
- Less likelyGateway module routing CAN messages incorrectly
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Knock Sensor
Related codes
- P032BKnock/Combustion Vibration Sensor C Circuit Range/Performance
- P0331Knock/Combustion Vibration Sensor B Circuit Range/Performance
- P033BKnock/Combustion Vibration Sensor D Circuit Range/Performance
- P0323Ignition/Distributor Engine Speed Input Circuit Intermittent
- P0324Knock/Combustion Vibration Control System Error
- P0325Knock Sensor 1 Circuit Malfunction (Bank 1)
- P0327Knock Sensor 1 Circuit Low Input (Bank 1)
- P0328Knock Sensor 1 Circuit High Input (Bank 1)
- P0329Knock/Combustion Vibration Sensor A Circuit Intermittent
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.