OBD-II code · Powertrain (generic)
P0324 Knock/Combustion Vibration Control System Error
The knock-control subsystem reports an internal error — typically a self-test fault or a noise floor that cannot be calibrated. The system protects against detonation by retarding ignition; with this fault knock control is disabled.
Is it safe to drive with P0324?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInternal knock-control fault
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Knock Sensor, Powertrain Control Module
Related codes
- P0321Ignition/Distributor Engine Speed Input Circuit Range/Performance
- P0322Ignition/Distributor Engine Speed Input Circuit No Signal
- P0323Ignition/Distributor Engine Speed Input Circuit Intermittent
- P0325Knock Sensor 1 Circuit Malfunction (Bank 1)
- P0326Knock/Combustion Vibration Sensor A Circuit Range/Performance
- P0327Knock Sensor 1 Circuit Low Input (Bank 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.