Hi getting a p0500 in PCM code Aswell as u2197 code in the HIM BEM and IC  modules. Car is a ba xr6t sedan.   No codes in ABS module    It seems it's either a issue with the wireing of pcm? Am I correct in this?    It only does it at start up and throws car into limp.mode with no Speedo Aswell. Turn car off and on and is ok again most of time.    I have read a post were someone had exact same issue and it was there HID bulb ballast causeing issue as they unpl