LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Out of the blue, DTC16, DTC18, DTC51

Old 08-14-2008, 02:49 PM
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Out of the blue, DTC16, DTC18, DTC51

Car has been running great, then all of a sudden I go to start and get these codes. Engine cranked and cranked and did not fire.

Turn the key off then attempted to restart and it fired right up. I understand that DTC16 is Opti-Low res pulse, DTC18 is injector circuit and DTC51 is PCM programming.


Car is running fine now.
Was this just a wierd fluke?
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Old 08-14-2008, 04:45 PM
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I would chalk it up as weird fluke cuz mine did the EXACT same thing
the other day and everything on my Z is brand friggin new . Mine also
threw 16 , 51 , 18 codes . I just reset the PCM and all is fine again
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Old 08-14-2008, 05:32 PM
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Check all your battery and ground connections.
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