I remember someone had a spark plug wire problem that cause some crazy codes. Maybe your wires are putting interference in the harness somewhere. Worth a look. If you haven't changed your wires yet, wouldn't hurt anything either.

My name is Richard. I was a Contouraholic. NOW: '02 Mazda B3000 Dual Sport, Black BEFORE: '99 Contour SE Sport Duratec ATX Spruce Green PIAA 510's, Foglight MOD, K&N Drop-in