hi fellas. i've got a vs auto 5.0L ute and recently ive noticed my engine light coming on now and again. it seems to put the car in a "limp" mode and restricts it to second gear. turning the car off and on again a few times seems to fix the problem temporarily. im guessing its a sensor thats playing up?? so where abouts is the computer and how can you test it for fault codes? am i on the right track? thanks guys. any help appreciated.