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2003 GMC Envoy Knock Sensor codes p0327,p0332

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30 Aug 2019 12:28 #33296 by This email address is being protected from spambots. You need JavaScript enabled to view it.
2003 GMC Envoy Knock Sensor codes p0327,p0332 was created by This email address is being protected from spambots. You need JavaScript enabled to view it.
there were and still few problems with this vehicle but lesser now. Can't get rid of Knock sensor codes p0327, p0332. I put in new sensor but still same code but different meaning. Before it was 4.88 v on both and code said circuit failed. Now it's .39 v on both but circuit too low. Any suggestions?
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01 Sep 2019 10:59 #33341 by Tyler
It sounds like you may have a defective NEW knock sensor. :(

Have you taken direct voltage readings at the knock sensor connectors? I'd suggest comparing #1 and #2 to see if there truly is a low signal voltage issue. While you're there, you can also compare the resistance between both sensors. If #2 is significantly lower than #1, then that'd suggest you still have a sensor problem.

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01 Sep 2019 14:56 #33347 by This email address is being protected from spambots. You need JavaScript enabled to view it.
Replied by This email address is being protected from spambots. You need JavaScript enabled to view it. on topic 2003 GMC Envoy Knock Sensor codes p0327,p0332
ok i Can try checking voltage at sensor itself and check resistance. how odd it is that both sensor might be defective? btw this engine has knocking from exhaust side. would that affect the knock sensors?

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02 Sep 2019 11:17 #33355 by Tyler
The knock should be detected by the sensors, but shouldn't result in the codes you're seeing. These codes describe circuit problems, while an actual knock problem should result in a P0326 or low power due to retarded ignition timing.

Replacement parts are a crap shoot these days. :silly:

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04 Sep 2019 23:29 #33424 by This email address is being protected from spambots. You need JavaScript enabled to view it.
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I checked voltage at sensor both are low and exact same like .03 v . then disconnected from computer and checked at computer same reading.

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