P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
What does P0325 mean?
P0325 — Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor) (bank 1). This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects knock sensor 1 circuit malfunction (bank 1 or single sensor) on bank 1. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0325
- Faulty knock sensor
- Damaged wiring or connector to the knock sensor
- Sensor mounting bolts loose or over-torqued
- Wrong sensor torque or thread damage
- PCM fault
How to fix P0325
- Inspect the knock sensor wiring and connector for damage
- Verify the sensor is mounted to the correct torque specification
- Test knock sensor resistance and output with a multimeter or scan tool
- Check that the sensor is the correct part for the engine
- Replace the knock sensor if the circuit tests confirm failure