I'm having trouble tracking down this problem. Service engine light comes on and flashes ONLY when driving, when I slow down to an idle it goes off. I use the EFI Live scanner to try and pull the code but nothing comes up....I've even tried to pull it while driving and still nothing. Along with the annoying light flashing on my dash, this prevents my converter from locking up into OD. While driving I clear the code-the converter locks in and the light goes off...A few seconds later the converter unlocks and the light comes back on. If anyone can help figure this out I'd greatly appreciate it.