Powertrain
generic / SAE
P0325
Knock Sensor 1 Circuit Malfunction (Bank 1)
A general fault has been detected in the bank 1 knock sensor circuit. The ECU uses the knock sensor to detect pre-ignition and retards ignition timing when knock occurs; with no signal, the ECU runs conservative timing and loses power.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 25
Possible causes
- Knock sensor failed high
- Sensor mounting bolt loose (sensor must be torqued correctly) medium
- Wiring fault low
Symptoms
- Check engine light on
- Power loss from defensive spark retard
- Increased fuel consumption
- Possible audible pinging under load
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–800 €
- Estimated time: 1.5–6 h
- Component: knock sensor
- Component: knock sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012