How do you acces the on board diagnostics in an 2003 Mustang GT. I've heard that you can get a digital read out of the rpm, temp, oil pressure, etc. Does anyone know how to acces this? I've heard that you turn the key to the on position and hold the button down in the dash, or something like that any ways.[sm=feedback.gif]

Figured it out, thanks.

For those of you who are interested...
1. hold down trip odometer button
2. put key in, turn to acc on. (do not start)
3. as soon as you see "test" let go
4. press the trip odometer button to scroll through displays.
5. to leave diagnostic mode on while driving, simply turn car on while in diagnostic mode.

I didn't even know you could do that. What year did that start?

Not sure when ever the ODBII came on vehicles I'd imagine, wasn't it like 1991 or 1992?

OBD II started in 1996, but the digital odometer in the Mustang didn't start untill 1999 I think.