I carry my scanner with me now all the time but wouldn't you know it the darn thing pops a code when I'm on the highway. If it ever does it and I can get over and hood up fast enough I'll try to grab it.

I'm thinking it may also be a wiring fault of some freaky sort.

1994 White Mazda B3000 4x4, 5 speed, lifted, Jet chip, UDP, K&N. 1995 Pumice Metallic Contour LX, 2.5l V6, 5 speed.