How To Fix Knock Sensor Low Voltage?

If the Knock Sensor Indicator Light does not illuminate after resetting the sensor, the Knock Sensor is likely defective and must be replaced. This is a straightforward procedure, but care must be taken to avoid injuring other components in the engine bay.

Locate the Knock Sensor, which is typically located on the side of the engine block or next to the intake manifold. After locating the Knock Sensor, detach the Knock Sensor Harness connector and remove the Knock Sensor.

Next, you must install the replacement Knock Sensor. To accomplish this, the new Knock Sensor must match the previous one as nearly as feasible. This covers the amount of wires and connector pins, among other characteristics. Then, you must connect the Knock Sensor Harness connector to the replacement Knock Sensor and secure it with the required bolts or screws.

Lastly, reconnect the Knock Sensor Harness connector to the engine harness and verify that the Knock Sensor Indicator Light illuminates. If the light does not turn on, it may be necessary to reset the Knock Sensor by pressing and holding the RESET button for approximately 5 seconds. After reconnecting the Knock Sensor Harness connector, confirm that the knock sensor indicator light illuminates. If it does, the Knock Sensor has been replaced successfully.

By following these instructions, you should be able to fix the Knock Sensor’s low voltage issue. It is easy to damage other components if you are not careful when operating in the engine compartment. If you are uncomfortable with the procedure, you should always see a skilled mechanic.


Cars were and will be my first love and favorite hobby; I decided to start writing about my discoveries and techniques to improve my cars or repair them.