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KNOCK SENSOR REPLACEMENT 2002 ODYSSEY. WHERE DO I FIND IT AND WHAT IS THE PROCEDURE TO REMOVE IT. I ALSO HEARD THAT MICE LIKE TO CHEW THE WIRE WHEN MAKING A NEST.

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  • LEONARD WILLIAM STEIN
    LEONARD WILLIAM STEIN Jan 02, 2017

    DO I HAVE TO PULL THE INTAKE MANIFOLD TO GE TO IT, IF SO GIVE ME SOME GUIDANCE

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Knock sensor is basically a microphone screwed directly into the engine block below the head, level with the cylinders and usually near the middle cylinders. The knock sensor is generally very reliable.

Mice do love to chew the insulation from wires but unless it can be seen the wires are damaged there is little point to replacing the knock sensor as the sensor connecting lead is usually fairly short. If damage to wiring is suspected it is likely to be where a mouse would find a more comfortable home than dangling from a lone wire in a draughty engine bay.

Posted on Jan 02, 2017

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Posted on Jan 02, 2017

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1 Answer

How do i change a knock sensor on a 1997 Nissan Altima?


Inspect/Test/Replace


A defective knock sensor may cause engine detonation or reduced spark advance and fuel economy. When a knock sensor is removed and replaced, the sensor must be tightened to its specified torque. If the knock sensor is installed tighter than it should be, it may become too sensitive and provide an excessively high voltage signal, resulting in more spark retard than required. When the knock sensor is installed looser than it should be, the knock sensor signal will be lower than normal, resulting in engine detonation.

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I think it not real probable that the cause of your knock sensor code is the result of bad gas. However, I suppose it IS possible. Most knock sensor codes are caused by engine mechanical problems like bad pully bearings, loose timing chains, broken valve springs, collapsed valve lifters, etc. that would cause a "knocking" or "tapping" in the engine.

The next most probable cause would be damaged knock sensor wiring. I have fixed many that have had damage from rodents getting into the engine compartment and chewing on the wires. Depending on which engine your Silverado is equipped with, the knock sensor could be mounted between the cylinder heads in the valley under the intake manifold. Mice like it under there.

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    0900c1528019fa95.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Knock sensor removal and installation-Mazda 3

  1. Disconnect the negative battery cable.
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  3. Disconnect the sensor connector.
  4. Remove the sensor from the engine block using special tool 49H018001 or equivalent.
  5. Installation is the reverse of the removal procedure.

    0900c1528019fa96.jpg enlarge_icon.gifenlarge_tooltip.gif GL G

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