How many miles do i need to drive for the "not Ready" on board computer to kick

Not really miles......every vehicle has a different 'drive cycle'. It will complete a cycle soon....if you are doing more driving than just to the store and work and back. I do know this vehicle has to sustain an engine temp of 175 degrees plus for a period of time. (coolant temp.)

As csubak30 said, all vehicles are different, and it is not a miles thing. Pretty typically... If you let the car cool completely down, overnight then drive to a place (freeway) where you can drive at a steady speed for 15 miles on way, 55-65 mph. Make sure the fuel tank is 3/4-1/4 full. Drive the car normally. Drive the car back that 15ish miles. Most likely the monitors will all run. If any have not, which does happen. There is something the computer does not like. And it is stopping it from running.