absolutely! it's actually pretty fun...
put key in ignition, push and hold
the odometer/trip mileage button (the little black one that comes out of the gauge cluster). turn the key to the "ON" position (where all the electronics turn on) while still holding the odometer/trip mileage button..do not start the Jeep! just turn it to "ON," the release the button.
the gauges will start their "dance:" calibrating themsleves, and the digital odometer readout will countdown (or does it count up?
)...AFTER it's done calibrating, the digital odo readout will display any error codes.
haven't had to check any error codes, but it's fun to watch
hope this helps
oh BTW, this works on my '99 TJ Sport..pretty sure it's the same for a '00