How much does it cost to fix P0325?

Typical repair cost is $100–$500.

P0325 — Knock Sensor 1 Circuit Malfunction

Medium Severity · Engine

OBD-II code P0325 means your vehicle's ECU detected: Knock Sensor 1 Circuit Malfunction. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.

Typical Repair Cost

$100–$500

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0325

Failed knock sensor
Wiring harness issue
Engine knock/detonation

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How to Fix Code P0325

Replace knock sensor ($50–$300)

Inspect sensor harness

Use higher octane fuel if knock is occurring

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FAQ — Code P0325

What does OBD-II code P0325 mean?

P0325 means your vehicle's onboard computer detected: Knock Sensor 1 Circuit Malfunction. This is a medium-severity code in the Engine category.

How much does it cost to fix code P0325?

Typical repair cost for P0325 is $100–$500 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.

Can I drive my car with code P0325?

Code P0325 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0325?

The most common causes are: Failed knock sensor, Wiring harness issue, Engine knock/detonation. Always start with the cheapest diagnosis step before replacing parts.

Will code P0325 clear itself?

Code P0325 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0325 showing on your car?

Enter your VIN for a free vehicle-specific report — recalls, specs, and market value. No signup required.

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.