My 2005 PT Cruiser throws the codes U0101 and P1603. Frequently it will not shift out of 1st gear when i start it or maybe shut it off at the gas station. I can reset the codes and sometimes the trans shifts great. Recently it wouldn't reset and remained in 1st only. Not good! I've decided the ECM needs to be replaced and would like to know if anyone has experience with a computer repair business.