P0325 – Knock sensor circuit problem

Knock sensor 1 circuit (Bank 1 or single sensor)

Ignition and misfires · generic OBD-II code

Drive gently

You can drive it, but take it easy and get it looked at soon – waiting usually makes the repair bigger.

Check this first

Have the wiring checked at the sensor first – the sensor sits on the engine and cooks its own connector.

What usually fixes it

In the order a good shop checks them. Typical total: $119–$575 at $130 an hour.

$119–$282

Wiring or connector

Heat-damaged wiring breaks the signal.

$248–$575

Knock sensor

The sensor fails and the computer pulls timing to be safe, so it feels flat.

What the vehicle can tell you itself

A stored code is a headline, not the story. The vehicle also holds the conditions when it happened, how close the part is to the limit it fails at, what the fuel trims are doing, and whether the fault is still happening right now. Drive DTC reads all of it with a USB adapter and a Windows PC – and it can't change a single setting on the vehicle.

See what your vehicle says about P0325

Codes in plain English, what usually causes them, what the repair costs, and whether it's safe to drive.

Look at Drive DTC   or check your VIN for free recalls