P0325 – Knock sensor circuit problem
Knock sensor 1 circuit (Bank 1 or single sensor)
Ignition and misfires · generic OBD-II code
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.
Wiring or connector
Heat-damaged wiring breaks the signal.
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.