P0325 - KNOCK SENSOR 1 CIRCUIT MALFUNTION

POST UPDATED IN February, 2023

Description of DTC code P0325 Generic

The sensor KS (Knock Sensor) is responsible for notifying the ECM (Engine Control module) if the situation arises in which one or more of the cylinders of the engine have a knocking. This happens when the energy given by the air-fuel mixture is negative, and if this lasts for a time it is harmful to the engine.

The Engine Control Module (ECM) uses that information to adjust the motor, so that it does not hit in this way. In case the Knock Sensor (KS) does not work correctly and therefore indicates that there is a blow, the Engine Control Module (ECM) can change the ignition timing of the engine.

This sensor (KS) is incorporated into the cylinder block or the intake manifold. When there is a vibration that hits from the cylinder block, it is interpreted as vibratory pressure, action that is converted as a voltage signal which is sent to the ECM (Engine Control module).

Symptoms of fault code P0325 Generic

Causes of OBD2 P0325 Generic

The problems of a DTC P0325 can be the following:

  • Some KS (Knock Sensor) sensor cable may be in short.
  • There may be a bad electrical connection in the Knock Sensor (KS).
  • The Knock Sensor (KS) may be defective.

Possible solutions of the DTC code P0325 Generic

To give the solution to the OBD2 Code P0325 you could review the following components:

  • Compare the resistance of the Knock Sensor (KS) with the factory specifications.
  • The cables leading to the KS (Knock Sensor) may be defective and short-circuit. Change it if it is necessary.
  • You can replace the Knock Sensor (KS).

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