P0325
Powertrain Codes
P0325 - NISSAN - Knock Sensor Circuit Malfunction
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
Possible Causes
- Knock sensor circuit short to ground
- Knock sensor circuit short to power
- Knock sensor circuit open
- Faulty knock sensor
- Faulty Engine Control Module (ECM)
When Detected
When an excessively low or high voltage from the sensor is sent to Engine Control Module (ECM)
Tech Notes
Very common problem with Nissan vehicles. Replacing the knock sensor usually takes care of the problem.
On most Nissan vehicles the knock sensor is located on top of the engine block.
Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. 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).