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U1301 Diagnostic Trouble Code Discussion for October 2008

Class 2 Data Line Short To Voltage

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Trouble Ticket Help Requests for DTC U1301
Help Request Posted
2003 Chevrolet Astro 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDM19X03
U1301: Class 2 Data Line Short To Voltage. ... intermitently the low fuel,abs, check guages and security light will flash off and on, check engine light will dimly light up and flicker and vehicle starts to misfire as if ckp sensor is dropping out. At that time I get about 6 different comm codes,u1041,...
October 07, 2008