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U2100 Diagnostic Trouble Code Discussion for April 2010

Controller Area Network BUS Communication

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Trouble Ticket Help Requests for DTC U2100
Help Request Posted
2005 Chevrolet Cobalt 2.2L Surge, MIL Lamp on, Hard shifts VIN: 1G1AK52F35
U2100: CAN communication error. ... The first time this car acted up, The complaint was the transmission started shifting hard, gauges acted erratic, steering got stiff and multible lights lit up to include traction control and ABS. Also the shifter interlock would engage and disengage rapid...
April 07, 2010