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U0121 Diagnostic Trouble Code Discussion for May 2010

Lost Communication With EBCM


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Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2007 Chevrolet Cobalt LT 2.2L MIL Lamp on VIN: 1G1AL55F27
U0121: . ... while driving down the road the odometer and speedometer bounce back and forth, along with all the warning lights coming on. The steering also becomes very hard. The car does not die. Then I pull over the car, turn if off and everything resets, but sometim...
May 26, 2010