Chevy Cobalt Forum banner


  1. P0128 and No Engine Coolant Temp Reading

    Problems and Service
    2007 Cobalt LT -- have cleared P0128 several times in the last few months, finally took the advice shown here on another post and replaced the thermostat. Mine looked like the one in the other post photo with the inner gasket/seat torn up. It was the original one, car has about 72k miles. No...