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According to the Service Notes Code 43:( Electronic spark control(ESC) circuit )

Check the knock sensor and from ECU (J1A11) cabel

should voltage 4-6V when you ignition "ON"

Y.Hotta

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anybody have a proven GM part number or GM vehicle reference to get the knock sensor? i used the one off the cross reference, but now my CEL stays on as soon as i start the car. before, the car would have to get fully warmed up, and them the CEL would come on with a code 43. car runs and idles smooth, but it is in limp mode because of the code 43.

i recently got a tank of bad fuel, and have flushed the system and tanks out. i just cannot seem to get rid of this darn code 43 !

Edited by THECARREAPER
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