my o2 ram 2500 started to loose throttle response after i would use the cruise for an extended time if i slapped the peddle a few times i would regain the throttle then it started to run bad and the cruise light would come on and go off by itself and the temp gage would peg out and i would loose throttle i changed out the pcm and the pump and ecu was replaced about 3 years ago all the codes are saying is that i had low voltage is this the apps or something else