P0325 on BMW — Knock Sensor Circuit Malfunction, Bank 1
BMW
Verified1 source
1 source
- Official data (NHTSA)official_feed
What P0325 means
Caution — monitor closely
The ECU isn't receiving a valid knock sensor signal — losing pre-ignition protection; the ECU may retard timing to compensate.
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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.
Common causes
- Broken or corroded knock sensor wiring
Symptoms
- Повышенный расход топлива
- Increased fuel consumption
- Reduced performance
What to check first
- Check sensor mounting torque
- Check signal with a scan tool
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