Technical Definition:

Knock (Sensor 1) Circuit (Bank 1) or Single Sensor

Technical Description:

A knock sensor tells the engine computer when one or more of your engine’s cylinders are “knocking”, that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.

Possible Causes:

• The knock sensor is faulty and needs to be replaced
• There is a wiring short/fault in the knock sensor circuit

Possible Symptoms:

Knock Sensor Circuit Malfunction

Possible Solutions:

• Check the resistance of the knock sensor (compare it to factory specs)
• Check for broken/frayed wires leading to the sensor
• Replace the knock sensor

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty knock sensor
– Knock sensor circuit poor electrical connection
– Knock sensor harness is open or shorted
– Faulty Engine Control Module (ECM)

Specific Makes:

– Possible Lack/Loss of Power