Engine Light ON (or Service Engine Soon Warning Light),Possible Lack/Loss of Power
P0331 MERCEDES-BENZ Possible Causes
Faulty Knock Sensor 2 Bank 2,Knock Sensor 2 Bank 2 circuit poor electrical connection,Knock Sensor 2 Bank 2 harness is open or shorted,Faulty Engine Control Module (ECM)
P0331 MERCEDES-BENZ 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).
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