2005 jeep wrangler sport check engine light came on then turned off
Alright, since the light came on, there will be a fault code stored.
Let's see if we can get the code.
Cycle the key on off on off on.....leaving it on. Do this with the doors closed and within 10 seconds.
Watch the mileage display and see if it changes to show a 4 digit number.
Let me know....