pimpjuice

So for some reason my odometer mileage gauge is not working, not sure what the f is going on. The speedometer works, but its just not calculating mileage. Not sure if the lift kit and larger wheels and tires would have affected this. While some shady people might like the fact there vehicle is not calculating miles. Its personally driving me nuts and am trying to figure out what the problem is. Any help would be appreciated.