Error code
OBD2 P0329
OBD2P0329
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Knock Sensor 1 Circuit Input Intermittent.
Severity
moderateCan drive, but performance issues may occur.
Summary
P0329 indicates an intermittent issue with Knock Sensor 1 on bank 1 of the engine. This sensor detects engine 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
- 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 it is determined to be bad.
FAQ
What does P0329 mean?
P0329 indicates an intermittent issue with Knock Sensor 1 on bank 1 of the engine.
How do I test a knock sensor?
Use a multimeter to check for AC voltage output when tapping near the sensor, or use a timing light to observe ignition timing retardation.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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