Hey listen i have F-150 98 and i had the same problems you had but when they checked my truck out with the comp. 5 things came up.I know o2 sensor was 1 of them with 4 more what my guy told me was to get on highway and drive truck at like 60mph for 50 miles and they will start to reset.So when i brought it back to get the inspection there was only 2 on and they can pass your truck with 2 on.So dont let them jerk or bull**** you.Let me know how youmake out!!!