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Knock Sensor Replacement Procedure

The knock sensor in your car detects a low-frequency engine knock and sends an electrical signal to other parts of your car. This makes knock sensors vital to proper engine timing, fuel efficiency and power.

Preparation

Varying in location on different vehicles, knock sensors are often found in the engine block, intake manifold or the cylinder head. While specific tool sizes may also differ by engine, youll generally need a ratchet with a socket fitting the knock sensors nut. Before beginning, drain the engine coolant.

Replacement

After caully removing the electrical connectors cover from the sensor, use the ratchet and socket to unscrew and remove the knock sensor. Evenly thread the new knock sensor into the hole and tighten it. Innova Electronics Corporation instructs to tighten the nut to the engine manufacturers inch-pound torque recommendation then reconnect the electrical connector.

After the Replacement

After replacing the knock sensor, youll replace the engine coolant and ensure that its full. Next, you should start the engine and visually inspect for coolant leaks, then test drive the vehicle to ensure proper working order. If the "Check Engine" light was on, it should turn off after replacing the knock sensor unless theres another engine problem. Continue to inspect for coolant leaks over the next few days, just to be sure.

Posted by Unknown at 4:45 PM

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Labels: knock, procedure, replacement, sensor