Johnbrown8907
Junior Member
I have a 2005 5.7 runs strong. Recently it started going into limp mode and shutting off completely while driving. I was thinking it was an O2 sensor before it did the same thing a couple years ago and I replaced both down steam sensors and I’m thinking it’s the upstream acting up now. Talking to a guy at work and he said it might need to have the computer “flashed” what are your thoughts? What is flashing?