I have a 99 Jeep XJ 4.0 with a Aw4 auto Trany. I just replaced the ECM computer because it wouldn't run. With the Snap on Solaris computer came up with a code for a TCC Solenoid. The vehicle had no Tranny issues before or does now. It still shifts fine through all the gears and feels like it goes into overdrive. Any information would be great upon what to look for because the check engine light will not go out even if I try to reset it or clear it.