Rick's Free Auto Repair Advice

U2106

U2106 Lost Comm with Trans Control System

This GM specific “U” code means that the PCM cannot communicate with the transmission control system. This is most likely the result of a problem with the data line between the two or a failure of a module on the data line that injects voltage onto the line.

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat

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