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P0327 - Knock Sensor Circuit Low Input

Possible causes
- Faulty knock sensor
- Knock sensor circuit poor electrical connection
- Knock sensor harness is open or shorted
- Faulty Engine Control Module (ECM)
Tech notes
The P0327 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.
When is the code detected?
An excessively low 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
P0327 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).

P0327 Information for specific makes
P0327 AUDI Knock Sensor 1 Circuit Low
P0327 BMW Knock Sensor Circuit Sensor 1 Error
P0327 BUICK Knock Sensor Circuit Low Input
P0327 CADILLAC Knock Sensor Circuit Low Input
P0327 CHEVROLET Knock Sensor Circuit Low Input
P0327 GMC Knock Sensor Circuit Low Input
P0327 HYUNDAI Knock Sensor 1 Circuit Low Input
P0327 INFINITI Knock Sensor Circuit Low Input Bank 1
P0327 ISUZU Knock Sensor 1 Circuit Low Frequency
P0327 KIA Knock Sensor 1 Circuit Low Input
P0327 LEXUS Knock Sensor 1 Circuit Low Input
P0327 MAZDA Knock Sensor Circuit Low Input
P0327 MERCEDES-BENZ Knock Sensor Circuit Low Input
P0327 MITSUBISHI Knock Sensor Circuit Low Bank 1
P0327 NISSAN Knock Sensor Circuit Low Input Bank 1
P0327 PONTIAC Knock Sensor Circuit Low Input
P0327 SATURN Knock Sensor Circuit Low Input
P0327 SCION Knock Sensor 1 Circuit Low Input
P0327 SUBARU Knock Sensor 1 Circuit Low Input Bank 1 Or Single Sensor
P0327 TOYOTA Knock Sensor 1 Circuit Low Input
P0327 VOLKSWAGEN Knock Sensor 1 Circuit Low
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