For Shop Owners

P0325 - Knock Sensor Circuit Malfunction

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Knock Sensor
  • Knock Sensor circuit poor electrical connection
  • Knock Sensor harness is open or shorted
  • Faulty Engine Control Module (ECM)
What does this mean?

Tech notes

The P0325 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause an engine performance problems. Replacing the knock sensor usually takes care of the problem.
What does this mean?

When is the code detected?

When an excessively low or high voltage from the sensor is sent to Engine Control Module (ECM)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible Lack/Loss of Power

P0325 Description

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head or intake manifold. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM). The ECM uses this signal to retard the ignition timing and protect the engine from this damaging pre-ignition.
OBDII Code P0325 - Knock Sensor Circuit Malfunction -

P0325 Information for specific makes

P0325 ACURA Knock Sensor Circuit Malfunction
P0325 BUICK Knock Sensor Circuit Malfunction
P0325 CADILLAC Knock Sensor Circuit Malfunction
P0325 CHEVROLET Knock Sensor Circuit Malfunction
P0325 FORD Knock Sensor 1 Circuit Bank 1
P0325 GMC Knock Sensor Circuit Malfunction
P0325 HONDA Knock Sensor Circuit Malfunction
P0325 HYUNDAI Knock Sensor Circuit Malfunction
P0325 INFINITI Knock Sensor Circuit Malfunction
P0325 KIA Knock Sensor Circuit Malfunction
P0325 LEXUS Knock Sensor Circuit Malfunction
P0325 LINCOLN Knock Sensor 1 Circuit Bank 1
P0325 MAZDA Knock Sensor Circuit Malfunction
P0325 MERCEDES-BENZ Knock Sensor Circuit Malfunction
P0325 MERCURY Knock Sensor 1 Circuit Bank 1
P0325 MITSUBISHI Knock Sensor Circuit Malfunction
P0325 NISSAN Knock Sensor Circuit Malfunction
P0325 PONTIAC Knock Sensor Circuit Malfunction
P0325 SATURN Knock Sensor Circuit Malfunction
P0325 SCION Knock Sensor Circuit Malfunction
P0325 TOYOTA Knock Sensor Circuit Malfunction

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P0325 Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0325 code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 2
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 04-16-2017

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