Question about 1990 Lexus LS 400
Where is the knock sensor located on the engine of a 1990 lexus LS 400
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Posted on Jan 02, 2017
SOURCE: 92 lexus es300 knock sensor
Need to remove the upper and lower air intake manifold. There are two knock sensors for the front and rear pistons banks. If you plan to do this yourself it is about 1 to 2 hours. While you are at it, there is a short coolant bypass hose sitting in the same spot, replace it. Another problem with the knock sensor is the wire harness used to connect the two knock sensors into one connection sometimes wears out and contacts the metal on the engine causing false signals to the ECM, so replace this cable also.
Just did this last summer on my 99 ES300. Pretty easy.
Posted on Mar 16, 2009
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