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P1223 Diagnostic Trouble Code Discussion for February 2010

Fuel Injector 1 Output Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1223
Help Request Posted
2003 Chevrolet Silverado 2500 HD 6.6L Misfire VIN: 1GCHK23163
P1223: Fuel Injector 1 Output Circuit Malfunction. ... back! I got this Duramax that has what I think is an injector or sleave problem but I cant prove it out because the scanner keeps dropping communication when I try to run a balance test or even just reading codes or fail records, it even looses comms when ...
February 22, 2010