Error code
OBD2 P0331
OBD2P0331
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Knock Sensor 2 Circuit Range/Performance.
Severity
moderateCan drive, but performance issues may occur.
Summary
P0331 indicates a problem with Knock Sensor 2 on bank 2 of your engine, which affects its range or performance.
Symptoms
- Lack of power
- Engine hesitation
- Pinging sounds
Common Causes
- Failed knock sensor
- Fault in the knock sensor circuit
- PCM failure
Diagnosis
- Visually inspect the sensor and connection.
- Perform a basic test of the knock sensor using a timing light or scan tool.
- Test the sensor output with a multimeter.
- Check the circuit continuity between the sensor and PCM.
Fixes
- Replace the faulty knock sensor if diagnosed as bad.
FAQ
What is a knock sensor?
A knock sensor detects engine knocking or pinging and sends signals to adjust ignition timing.
How do I test the circuit of the knock sensor?
Use a multimeter to check for continuity between the sensor connector and PCM input pin.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0300Random/Multiple Cylinder Misfire Detected
- P0301Cylinder 1 Misfire Detected
- P0302Cylinder 2 Misfire Detected
- P0303Cylinder 3 Misfire Detected
- P0304Cylinder 4 Misfire Detected
- P0305Cylinder 5 Misfire Detected
- P0306Cylinder 6 Misfire Detected
- P0307Cylinder 7 Misfire Detected
- P0308Cylinder 8 Misfire Detected
- P0309Cylinder 9 Misfire Detected
- P0310Cylinder 10 Misfire Detected
- P0311Cylinder 11 Misfire Detected