P0325Medium urgency

Knock Sensor Circuit Malfunction (Bank 1)

Engine · Knock Control

⚠️ Fix soon — engine may be unprotected from knock damage.

What this means

The knock sensor on Bank 1 is not functioning properly. Without it, the ECU cannot protect the engine from knock damage by retarding ignition timing.

Likely causes

Estimated repair cost

Knock sensor replacement$150 – $500

Wiring repair$75 – $200

Frequently asked questions

The knock sensor on Bank 1 is not functioning properly. Without it, the ECU cannot protect the engine from knock damage by retarding ignition timing.

Fix soon — engine may be unprotected from knock damage.

Repair costs for P0325 range from $150 – $500 depending on the root cause and your vehicle.

You can drive short distances but should have it repaired within 1-2 weeks to prevent further damage.