Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Buick >> 2013 >> Regal GS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1901 >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
B+ 1 1 - -
Serial Data U1901 00 U1901 00 U1901 00 -
Ground - 1 - -
1. S56 Radio Control Multifunction Switch Malfunction