Put tape over the check engine light. Seriously, I've done that a couple of times. Somebody removed all the emissions stuff from my Camaro and the light would always come on after about 20-30 mins driving flat out on the motorway. At night this would be very bright so on the odd occasion I was driving that late the tape worked fine!

edit: I forgot that this was of course Homer Simpson's idea in #AABF04

Gareth