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

1-4 lamp circuits

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Old 03-30-2011, 11:19 AM
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Default 1-4 lamp circuits

pk problem is code reading lamp circuits 1-4 what does that mean? im new to the lt1 worls so any help wpuld be thankful. my car has hooker lt 3 in exhaust, magnaflow, k n cai, egr, air delete, tb by pass, msd ignition,
Old 03-30-2011, 11:56 AM
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anyone? anything?
Old 03-30-2011, 12:35 PM
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Don't understand what you are saying...
Old 03-30-2011, 02:31 PM
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ses light came so i put a scan tool n it read lamp circuits 1-4. and i dont know what that means,
Old 03-30-2011, 02:33 PM
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I'm just guessing but skip shift indicator problem
Old 03-30-2011, 02:40 PM
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i got a 4l60e trans so i wud i fix that if it is it and where is it at in the car?
Old 03-30-2011, 02:53 PM
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Originally Posted by 95formulalt1350
ses light came so i put a scan tool n it read lamp circuits 1-4. and i dont know what that means,
I don't know what that means, either. Never heard of such a thing. Post the exact trouble code.
Old 03-30-2011, 03:12 PM
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96-97 6-speed car? DTC P1664 1-4 Upshift Lamp Control Circuit (?)
Old 03-30-2011, 03:39 PM
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its a 95 and its a auto 4l60e so idk wat to do
Old 03-30-2011, 03:53 PM
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Originally Posted by 95formulalt1350
its a 95 and its a auto 4l60e so idk wat to do
Is it actually P1664? You shouldn't be getting that code with your equipment. Has someone altered the PCM programming?
Old 03-31-2011, 10:53 AM
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i have no idea i bought the car for 2000$ in it came with the performance parts on it already. it just needs a lil work but ill scan it again in see what the code says



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