ODBII on but not reading
07-02-2007, 08:20 PM
#1
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ODBII on but not reading I did a heads/cam swap on my 00 SS and when i went to turn the car on it would turn over but not start and the fuel pump would not turn on. i plugged in a code reader and it started right up. the biggest problem is that i cannot have the car tuned because when you plug into it it will not communicate with whatever is plugged into it. but it will communicate with the code reader. I believe that it is communicating with everything but the pcm. anyone have this problem?
07-03-2007, 09:25 AM
#2
Missing ground on the back of the passenger side head. There should be three ground wires connected back there. It's the passenger side on a 98 & may be different on an 00. Never the less, check the grounds.
07-03-2007, 06:09 PM
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you have this problem before? i put the grounds back on but maybe they werent in the right place. i wouldnt think it should matter where its mounted as long as it gets a ground.
07-04-2007, 09:23 AM
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Yeah thats the thing. i have checked every fuse and they are all fine. i even put a bigger fuse in the cig. i had a friend of mine that works at the dealership here look at it and he was clueless and couldnt get his gm code reader to work on it. he traced wires for well over an hour and no luck.
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07-12-2007, 05:56 PM
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oh no..........having the same type of problem............had a SES light on b/c of the cats, gm dealer replaced them with postive results, then when i went to get it inspected it failed because no comms could be established with the computer.....any ideas???? Cig lighter is working and fuses are all good. I am going to take it back the the dealer to ask. thanks
07-12-2007, 09:47 PM
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yeah man im re-assembling everything because i did an engine change. ive checked everything but i still have a gut feeling its not gonna work. let me know what the dealer finds out. my friend from the dealership is coming back sunday to check it out some more if its not fixed.
07-19-2007, 03:19 PM
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well this is another one of those things ill never figure out because re-install is finished and everything is fine. i cant figure out why but i really dont care now because it works. thanks for the advice guys.