P0325Severity: Medium
P0325 – Knock Sensor Circuit (Bank 1)
A fault was detected in the knock sensor circuit.
What it means
The knock sensor detects pre-ignition (knock) and tells the ECU to retard timing. When it fails, the ECU keeps timing conservative and performance drops.
Symptoms
- Power/performance loss
- Increased fuel use
- Check-engine light
- Sometimes knocking noise
Common causes
- Faulty knock sensor
- Wiring/connector issue
- Loose sensor mounting
- ECU software/fault
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Frequently asked questions
What does trouble code P0325 mean?
P0325 – Knock Sensor Circuit (Bank 1). The knock sensor detects pre-ignition (knock) and tells the ECU to retard timing. When it fails, the ECU keeps timing conservative and performance drops.
Can I drive with a P0325 code?
You can usually drive short distances, but it's best to have it checked before it gets worse.