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

pcmforless tune and now "service engine soon" light is on...

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Old Feb 22, 2005 | 05:38 PM
  #1  
IrocManiac's Avatar
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From: Tulsa
pcmforless tune and now "service engine soon" light is on...

Hey guys I popped that pcm in and the car runs perfect but I have a service engine soon light. Only thing I can think of is previously I had disconnected the sensor by the cat on the exhaust, and disabled it. Maybe its trying to find that sensor? You think if I plug it back in it'll solve that problem? I'm goin to try it when I get outta class and drive it home and see whats up. Other then that its running awesome.
Old Feb 22, 2005 | 05:58 PM
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Re: pcmforless tune and now "service engine soon" light is on...

Guessing at codes is really a waste of time. You need to determine the code with a scanner.
Old Feb 22, 2005 | 06:00 PM
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IrocManiac's Avatar
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Re: pcmforless tune and now "service engine soon" light is on...

Originally Posted by shoebox
Guessing at codes is really a waste of time. You need to determine the code with a scanner.
Yeah, I'm going to plug that in and if that doesn't work I'll take it by a friend with a scanner. Just wierd, as soon as I hook up the old one its fine, but with the new one its throwing a code....just strange
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