If the CEL is on/flashing, you should be able to get the code from it.
I have attached the guide for reading the codes. I am fairly sure this is the GC8 one, though I also have a liberty one so here's hoping they aren't mixed up or something.
Once you plug the read connectors (black) together, the CEL should flash, short and long flashes in a sequence. If you read the guide it should determine what code/problem it is detecting.
You shouldn't be using the green connectors unless you want to clear codes completely.
Last edited by Jezza; 09-01-2014 at 12:21 PM.
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