Chevy Cobalt Forum banner

lost comm to the tcm

  1. 07 SS 2.4, U0101 Code, No Speedometer, Power Steering, Abs

    Problems and Service
    Hi Everyone!! First time poster here. I bought a 2007 Cobalt SS 2.4 Automatic that had a bad timing chain. I put a new timing chain in and the motor runs great, but I have a U0101 code (Lost comm with TCM) and power steering, traction control starts flashing on the display and the ABS light...