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U1300 Diagnostic Trouble Code Discussion for September 2004

Class 2 Data Line Short To Ground

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Trouble Ticket Help Requests for DTC U1300
Help Request Posted
2001 Saturn SL2 1.9L No Start VIN: 1G8ZK52751
U1300: Class 2 Data Link Circuit Low Input. ... start. when it doesnt start, there is a U1300 code. the archives come up empty. its some kind of data link short . i looked at a wiring diagram and it goes from the pcm, thru the dash, thru a "sensing and diganostic module", then thru the bcm, back...
September 29, 2004