The knock sensor sends information to a vehicle’s engine control module (ECM) when the air/fuel mixture explodes incorrectly. Transmitting this information prompts timing correction that helps control loss of power and protects the engine from damage. Replacing a faulty knock sensor is important, but you need to know some key facts.
Before you begin trying to remove your knock sensor, consider your knowledge of vehicle mechanics. Cars Direct warns, “... you need to have a pretty good working knowledge of how to work on cars to do this. Otherwise the money you think you might save doing it yourself may turn out to be a lot more than if you had just taken it into the mechanic.”
Much of the labor and time involved in removing a knock sensor stems from the need to remove other parts. You will need to remove the engine’s manifold. It is also necessary to disconnect other parts such as the radiator and its hosing, the power steering belt, and the alternator belt.
Once you finally locate the knock sensor, the job becomes easy. According to Car Tech Auto parts, you are likely to find that you only need to unscrew a single bolt and remove the harness. Some vehicles have knock sensors that are held in place with clamps.
