What does fault code P0325 mean?

Knock Sensor 1 Circuit Malfunction (Bank 1). Knock sensor circuit fault. ECM may retard timing as precaution.

P0325

Knock Sensor 1 Circuit Malfunction (Bank 1)

Q: What are the symptoms of P0325?

CEL; Possible reduced power; Real knock under load if sensor dead

Q: What are the possible causes of P0325?

Failed knock sensor; Wiring; Poor mounting torque; Mechanical noise

Q: How to fix P0325?

Inspect connector and wiring; Check mounting torque; Replace sensor with proper torque

Severity: Medium Ignition System Generic OBD-II Code Est. Repair: $120 - $350

Schedule diagnosis soon. Continued driving may worsen the issue.

Quick Answer

P0325 means “Knock Sensor 1 Circuit Malfunction (Bank 1).” Severity: Medium. Estimated repair cost: $120 - $350. Most common sign: CEL.

What Does P0325 Mean?

Knock sensor circuit fault. ECM may retard timing as precaution.

Common Symptoms

CEL

Possible reduced power

Real knock under load if sensor dead

Possible Causes

Failed knock sensor

Wiring

Poor mounting torque

Mechanical noise

How to Fix P0325 – Repair Guide

Inspect connector and wiring

Check mounting torque

Replace sensor with proper torque

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Budgeting for This Repair?

A typical P0325 repair runs about $120 - $350. If you'd rather spread the cost over time, estimate the payment with our free sister tool: Car Finance Calculator (50-state sales tax, trade-in equity, full amortization).

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.