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Powertrain fault code

P0325: Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

Fix soon

The engine may run with reduced power to protect itself. Have it checked soon.

What P0325 means

The knock sensor signal is missing or out of range. This sensor listens for engine knock so the computer can protect the engine.

Common causes

  • Faulty knock sensor
  • Damaged wiring or connector
  • Sensor not tightened correctly

What to check first

  1. Check the sensor wiring.
  2. Use the fuel grade the manufacturer recommends.

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Read your car's codes yourself, free

Plug a cheap ELM327 OBD-II adapter into the port under the dashboard and open the scan tool: Chrome or Edge on a computer with a USB adapter, or Chrome on Android with a Bluetooth LE adapter. It reads and clears codes and shows emissions readiness. It does not work on iPhone.

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Related codes

P0330

General guidance only, not a diagnosis. A qualified mechanic should confirm the cause before you replace parts.