LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Just threw 2 codes out of no where...some info?

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Old 08-06-2007, 11:09 PM
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Question Just threw 2 codes out of no where...some info?

I've done my googling but wanted to know from a personal first hand experience from anyone here who has had these codes:

P1641
Malfunction Indicator Lamp (MIL) Control Circuit

P1642
Vehicle Speed Output Circuit


What needs to be replaced? I'm use to (on my last bird) throwing 4l60e tranny codes left and right, and now on my M6 birdie I get these two lame codes?

Also, I noticed I obviously threw codes because my SES light came on, so my check engine (MIL) isn't working? Someone shed some light on this... hmmmmm


Thanks all!
~Brian




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