That would explain the p0183. let us know.
The P0171 and p0303 are common issues BUT the flex code would be first... meanwhile you could check for vacuum leak @#3 cylinder, maybe add a can of injector cleaner (seafoam or techron) if injector is partially restricted. As we look into flex fuel code.
That is a fast ck before reassigning the code to a unlikely component.
P018x is not the IAT series it is assigned fuel system.
HOPEFULLY replacing the wire connector and the fuel pressure sensor will fix our problem.
Will post back if problems are resolved.
Thanks SO much for the help,
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