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U1000 Diagnostic Trouble Code Discussion for July 2012

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29172
U1000: Class 2 Communication Malfunction. ... the vehicle is hard to start. Longer cranking times. The engine does not overheat. Truck has never died while driving. If drive for 20 or so miles and shut off for about 30 minutes it will crank but not start. When it acts up the desired fuel rail pressure...
July 11, 2012
2004 Nissan 350Z Track 3.5L MIL Lamp on VIN: JN1AZ34D84
U1000: Controller Area Network Line Malfunction. vehicle came to the shop with no power, scope the pedal sensor , found low voltage fron the sensor, replace the sensor ,now vehicle has the power, i also diagnose o2 sensor circuit found no problem. install a factory 02, code came back ,check all circuits thei...
July 16, 2012
2001 Cadillac Eldorado ETC 4.6L No Start, No crank VIN: 1G6ET12951
U1000: Class 2 Communication Malfunction. First,thanks in advance for your time and any assistance. This vehicle came from a used car dealer. This beast was presented to us as a no crank concern. We were told that up until that point it was running fine and had been for a couple of weeks after having ...
July 20, 2012
2005 Nissan Pathfinder LE 4.0L No Start, MIL Lamp on VIN: 5N1AR18U05
U1000: Controller Area Network Line Malfunction. Vehicle was towed in as no start.Vehicle started and ran.scanned no codes,except vds lite on.Let run 10 min. and drove 3 miles. Still ran,When put in d or r headlites would turn off and mil,vdc and slip lites would come on.In neutral or park headlites would tu...
July 22, 2012
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29172
U1000: Class 2 Communication Malfunction. ... the vehicle is hard to start. Longer cranking times. The engine does not overheat. Truck has never died while driving. If drive for 20 or so miles and shut off for about 30 minutes it will crank but not start. When it acts up the desired fuel rail pressure...
July 11, 2012
2004 Nissan 350Z Track 3.5L MIL Lamp on VIN: JN1AZ34D84
U1000: Controller Area Network Line Malfunction. vehicle came to the shop with no power, scope the pedal sensor , found low voltage fron the sensor, replace the sensor ,now vehicle has the power, i also diagnose o2 sensor circuit found no problem. install a factory 02, code came back ,check all circuits thei...
July 16, 2012
2001 Cadillac Eldorado ETC 4.6L No Start, No crank VIN: 1G6ET12951
U1000: Class 2 Communication Malfunction. First,thanks in advance for your time and any assistance. This vehicle came from a used car dealer. This beast was presented to us as a no crank concern. We were told that up until that point it was running fine and had been for a couple of weeks after having ...
July 20, 2012
2005 Nissan Pathfinder LE 4.0L No Start, MIL Lamp on VIN: 5N1AR18U05
U1000: Controller Area Network Line Malfunction. Vehicle was towed in as no start.Vehicle started and ran.scanned no codes,except vds lite on.Let run 10 min. and drove 3 miles. Still ran,When put in d or r headlites would turn off and mil,vdc and slip lites would come on.In neutral or park headlites would tu...
July 22, 2012