P0325: Knock Sensor 1 Circuit Malfunction (Bank 1)

The knock sensor on bank 1 has failed or its wiring is broken.

Low Severity

$100 – $600

Typical repair cost range

Get Estimate for My Car

Can I Keep Driving with Code P0325?

Yes, but you may lose power, fuel economy, and run risk of engine knock under load.

What P0325 Means

Knock sensors listen for the sound of detonation (knocking) and tell the computer to retard timing. P0325 means the sensor is not reporting properly, often a failed sensor or broken wire.

Common Causes

Diagnostic Tips

On some engines (Toyota V6, GM trucks) the sensor is buried under the intake manifold, making labor expensive.
Check wiring before condemning the sensor.

Skip the Guesswork

Get an AI estimate for the most likely repair on your exact car, in under a minute.

Get My Free Estimate

Frequently Asked Questions

Is P0325 serious?

Not immediately, but loss of knock detection can let real engine damage happen if you run low-octane fuel or work the engine hard.