What does it mean?
This diagnostic code (DTC) is a generic powertrain code, meaning it applies to vehicles equipped with OBD-II. Although generic, specific repair steps may vary by make/model.
A knock sensor tells the engine computer when one or more of your engine’s cylinders are “knocking,” meaning they’re exploding the air/fuel mixture in a way that delivers less power and can damage the engine if prolonged. The computer uses this information to adjust the engine so it doesn’t knock. If your knock sensor wasn’t working properly, so that it always indicated a knock, the engine computer’s response might have been to alter your engine’s ignition timing. Knock sensors are typically bolted or screwed into the engine block.
This P0330 code may appear intermittently, or the Service Engine light may be on continuously. Other DTCs related to knock sensors include P0325.
Symptoms
You may notice driving issues, including a lack of power and possibly some hesitation. There may also be other symptoms.
Causes
A P0330 code most likely means one or more of the following events has occurred:
The “B” knock sensor is faulty and needs to be replaced
There is a short circuit/fault in the knock sensor circuit wiring
Possible Solutions
Check the resistance of the knock sensor on bank 2 (compare it to factory specifications)
Check for broken/frayed wires leading to the sensor
Replace the knock sensor on bank 2