He guys i just went out to get pizza and on my way over there the cel came on when i got there i checked oil and transmission fluid. both where ok i started car again and cel was gone.

didn't even get out of parking lot and came back on.

went back off a min later and never came back on.
What could this be? 0/2 sensor?
idling , hills , speeds or taking off at red light didnt seem to matter.
It did have a high idle when i started it at pizza house