Diagnostic trouble code
P0325
Powertrain
Unverified
Powertrain (P)
Ignition / Knock
Knock sensor circuit malfunction — Bank 1
The knock sensor circuit is faulty; the ECM may retard timing to protect the engine.
What P0325 means
The knock sensor circuit is faulty; the ECM may retard timing to protect the engine.
Symptoms you may notice
- Check engine light
- Loss of performance (timing retarded)
Possible causes
- Faulty knock sensor
- Wiring or connector fault
- Sensor torqued incorrectly
Causes are listed from most to least likely for this code. Confirm the actual cause with the diagnostic checks before replacing parts.
Checks to run
- Test sensor signal
- Check wiring
- Verify correct torque on sensor
Tools you may need
Multimeter
OBD-II scanner
Related codes
More Ignition / Knock codes →Verification and editorial notes
UnverifiedThis page has not been technically verified yet. Confirm the diagnosis and measurements in the workshop manual for your vehicle.
Diagnose before replacing. A diagnostic trouble code identifies the circuit or
system the control unit flagged. It does not prove that a particular part has failed. Confirm
the cause with the measurements and checks above, and follow the workshop manual for your exact
engine before replacing parts or clearing codes.