P0325 on a Ford: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can drive, but the engine runs with reduced timing protection and fuel economy may drop, so have the knock sensor checked soon.

What P0325 means on a Ford

On a Ford, P0325 means the knock sensor on bank 1 is not sending a proper signal to the engine computer. The sensor lets the computer adjust ignition timing to prevent engine knock, so a bad circuit leaves the engine without that protection.

Is P0325 common on Fords?

P0325 is seen on Fords with higher mileage, especially F-150, Explorer, and Escape models. Knock sensor failure and wiring harness damage near the sensor are the common causes, and on V8 and EcoBoost engines the sensor can be tucked under the intake.

Commonly reported on: F-150, Explorer, Escape, Fusion.

Symptoms

Check engine light on
Reduced fuel economy
Engine pinging under load
Slight loss of power

Common causes

most common: Failed knock sensor
common: Chafed or damaged wiring harness
common: Corroded or loose sensor connector
rare: Engine computer issue

How to fix it

Fix	DIY?	Typical cost
Replace the knock sensor	Yes	$150–450
Repair the wiring harness near the sensor	Mechanic	$100–350
Clean and reseat the sensor connector	Yes	$20–60

Frequently asked questions

Can I drive a Ford with a P0325 code?

Yes, in most cases. The engine still runs, but without knock protection it may ping under load, and fuel economy can drop, so get it checked soon.

What usually causes P0325 on a Ford?

A failed knock sensor or damaged wiring near the sensor, common on F-150, Explorer, and Escape models. On EcoBoost engines the sensor can be hard to reach.

How much does it cost to fix P0325 on a Ford?

Replacing the knock sensor typically runs $150–450 with parts and labor. A wiring repair is usually $100–350, and cleaning the connector is a cheap fix.