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U1000 Diagnostic Trouble Code Discussion for April 2007

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2000 Chevrolet Cavalier 2.2L No Start, Stall, MIL Lamp on VIN: 3G2JB1240Y
U1000: Class 2 Communication Malfunction. Car came in on wrecker because it stalled on highway and would not restart.I have a alldata system but was unable to find this code this afternoon in there info.I can not call them untill mon am and thought that someone has seen this before.I checked data seri...
April 14, 2007
2002 Pontiac Sunfire SE 2.2L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G2JB12472
U1000: Class 2 Communication Malfunction. ... weeks ago. Brought in yesterday complaining of intermittent hesitation and cut out. Also instrument cluster lights go on and off while during idle and while driving. All this occurred mysteriously after customer installed aftermarket sub woofer stero speak...
April 17, 2007
2000 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NF12T6Y
U1000: Class 2 Communication Malfunction. We have had this vehicle for some time, customer finally traded in after so many problems diagnosing this concern. Withscan tool connected fuel pump relay isnt engaging all the time, when fuel pump relay is in off state vehicle wont start, intermittantaly the ...
April 20, 2007