S10 Pickup, Sonoma 2000-2004

2.2L L4 VIN 4 N/R 3


Trouble Code: U1305

Class 2 Data Link High or Low

Possible Causes:

Class 2 serial data line has either a high or low voltage condition on the circuit, and the module cannot identify the fault
One or more modules on Class 2 line has an short to power
One or more modules on the Class 2 line has a short to ground