Error code
OBD2 P0327
OBD2P0327
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Knock Sensor 1 Circuit Low.
Severity
moderateCan drive, but performance issues may occur.
Summary
P0327 indicates a low input signal from Knock Sensor 1 on bank 1 of the engine. This sensor detects spark knock and sends signals to the PCM.
Symptoms
- Lack of power
- Engine hesitation
- Pinging or knocking sounds
Common Causes
- Failed knock sensor
- Fault in the knock sensor circuit
- Incorrectly tightened or insecure knock sensor
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
FAQ
What is a knock sensor?
A knock sensor detects engine knocking or pinging and sends signals to the PCM to adjust ignition timing.
How do I test my knock sensor?
Use a multimeter to check for AC voltage output when tapping near the sensor, or use a scan tool to monitor ignition timing changes.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
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- 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