Code
P0325
Ignition / Knock
Knock sensor circuit malfunction — Bank 1
The knock sensor circuit is faulty; the ECM may retard timing to protect the engine.
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Most likely causes
- Faulty knock sensor
- Wiring or connector fault
- Sensor torqued incorrectly
Symptoms you may notice
- Check engine light
- Loss of performance (timing retarded)
Checks to run
- Test sensor signal
- Check wiring
- Verify correct torque on sensor
Tools you may need
Multimeter
OBD-II scanner
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.