James Cain
Active Member
So I got my SCT X4 with my custom tunes from 5 star tuning and followed the directions to program. Immediately after programming, I have a check engine light and it comes up as a U0100 code when checking it with my programmer. I do see a noticeable difference when driving the truck so it seems to have took the tune, but wondering if anyone else has had this issue after getting their 5 star tunes?