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U1000 Diagnostic Trouble Code Discussion for January 2011

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2003 Pontiac Grand Am GT 3.4L No Start, Stall VIN: 1G2NW52EX3
U1000: Class 2 Communication Malfunction. Knowing that the fuel pump has been replaced and battery and alternator. Customer says it stalled on highway and not started until later when tow truck arrived... I drove it.. Drove fine... After a hot soak it not started.. With fuel gauge on car.. I noticed t...
January 07, 2011
2005 Nissan Pathfinder LE 4.0L No Start VIN: 5N1AR18W95
U1000: Controller Area Network Line Malfunction. This Pathfinder has an intermittant no start. Customer drove it in when it started. I finally got lucky and it started, so I pulled it in the shop. Checked for Engine codes-none. Let it hot soak and it didn't start again. The Data would stream for the first fi...
January 10, 2011
2003 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52JX3
U1000: Class 2 Communication Malfunction. U1000 stays current in PCM only. SDM,BCM,Radio,Remote fuction actuator, all comunicate. RFA had a history code B1327, devicepower circuit low code (cleared not returned). Does not have ABS. All know modules communicate. Fuses all have Batt voltage with the key...
January 31, 2011
2003 Pontiac Grand Am GT 3.4L No Start, Stall VIN: 1G2NW52EX3
U1000: Class 2 Communication Malfunction. Knowing that the fuel pump has been replaced and battery and alternator. Customer says it stalled on highway and not started until later when tow truck arrived... I drove it.. Drove fine... After a hot soak it not started.. With fuel gauge on car.. I noticed t...
January 07, 2011
2005 Nissan Pathfinder LE 4.0L No Start VIN: 5N1AR18W95
U1000: Controller Area Network Line Malfunction. This Pathfinder has an intermittant no start. Customer drove it in when it started. I finally got lucky and it started, so I pulled it in the shop. Checked for Engine codes-none. Let it hot soak and it didn't start again. The Data would stream for the first fi...
January 10, 2011
2003 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52JX3
U1000: Class 2 Communication Malfunction. U1000 stays current in PCM only. SDM,BCM,Radio,Remote fuction actuator, all comunicate. RFA had a history code B1327, devicepower circuit low code (cleared not returned). Does not have ABS. All know modules communicate. Fuses all have Batt voltage with the key...
January 31, 2011