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U1800 Diagnostic Trouble Code Discussion for January 2010

Lost Communication With Fuel Injector Control Module


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Trouble Ticket Help Requests for DTC U1800
Help Request Posted
2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK24154
U1800: lost communication with FICM. The customer brought us the truck due to the MIL being on. We cleared the code and gave the truck back. The light stayed off for a couple of days but then came back on. The same codes are present as the first time. We have checked and cleaned all grounds. My n...
January 25, 2010
2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK24154
U1800: lost communication with FICM. The customer brought us the truck due to the MIL being on. We cleared the code and gave the truck back. The light stayed off for a couple of days but then came back on. The same codes are present as the first time. We have checked and cleaned all grounds. My n...
January 25, 2010