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Old 06-23-08, 01:58 AM
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Re: Advice on what to do to resolve codes

All the symptoms will point me to a gas issue (like no gas pressure = bad pump) but the codes are very clear about a bug with the serial data line.
P0603, B1552, B1983 and even U1255 are from the deep battery cycle, but all the rest are more than clear about the data line problem.
Another thing, you can have all this strange modules communication errors just because of a low voltage. This is where I would start first, try a known good battery.