When I put my uppipe on the cel never came on. When I put my bosal short catless dp on the cel came on. So i was told its from the uppipe which when I just had that it never came on. So I used the resister mod. After a little driving the light came on. If I do the fix for the dp with the mechanical fix, would it be fine to reconnect the up sensor back up, cause I dont think the catless up had anything to do with the cel.