Question about 2001 Pontiac Grand Prix

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I need to know what the knock sensors wiring is i see only one wire.

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There is only 1 wire. it grounds itself out.

Posted on Apr 06, 2011

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Hello Friend:

Your Anti-Knock Sensor is Located With Hood Raised Facing the Engine Compartment,Its on the LEFT SIDE Right Under your Exhaust Manifold Towards the Back.

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I have A 2004 it has 57000 mi on it im the 2nd owner it.The ingine lite came on ,jef wiler said the warinty was no good because i didn,t know who had worked on it and wanted $5000. for a new engine . i...


You need to change the knock sensor. The knock sensor advances or retarts timing until spark knock is eliminated. If the wire is not connect to the knock sensor you will get the knock sensor code. So make sure the wire is connected to the knock sensor. Please let me know what happens.

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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.
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Where is the Knock Sensor located on a 1994 Lexus ES300


  1. located on top of engine below intake manifoldgraphic.aspx?mod=reptiff&module_id=1&session_id=%7ba7aa889f-b7e3-42e1-9ece-3476a2533f69%7d&image_guid=95d24086&print_bw=0&

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1 Answer

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yes sir, the knock sensor is located on the side of the engine block, the side closest to the firewall. it is just a small circular object with a wire connector and one bolt

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