27-egr elec. fault qdm

26-quad drvr mod 1 fault

66-a/c pressure sensor

77-fan 1 fault

53-system volt too high

51-ecm prom error

91-1-4 lamp circut

ok well i know that the ac and egr codes are on because i removed them both. are the rest because i put an oversize cam in ? do you guys think that a tune from pcm for less will fix these? i do have the lt4 km in if that makes a difference.... can anyone give me a description of whats causing these? im hoping the tune will fix these codes

 

Clear the codes, see what comes back. Use the code list link in my sig. Most of the things you left off are going to have to be programmed out.

 

thanks for the info shoebox...i appreciate it. the only thing that concerns me is 53 system voltage high. any idea what could cause this? also in your honest opinion do you think that pcmforless is a good source to get the pcm tuned?

 

PCMforless.com tuned my car, both mail-order and on the dyno. I'd say the results are acceptable.