And guess what, it comes stock with any 99-04 Mustang!
It's a cool little trick, it's a dealer's test on the Mustang. All you have to do is push in the odometer button while the car is shut off and continue to hold it in until you have started the car and the odometer reads "test". At this point pushing the odometer button will cycle through various bits of information.
Information like your speed (to the tenth), your rpm's, and the temperature of the exhaust expressed in Celsius. Also, you can find which DTC (Diagnostic Trouble Codes) that your car has.
It's a cool little trick, it's a dealer's test on the Mustang. All you have to do is push in the odometer button while the car is shut off and continue to hold it in until you have started the car and the odometer reads "test". At this point pushing the odometer button will cycle through various bits of information.
Information like your speed (to the tenth), your rpm's, and the temperature of the exhaust expressed in Celsius. Also, you can find which DTC (Diagnostic Trouble Codes) that your car has.