X5, check engine light

[easonliu]

My 2010 X5 gets a check engine light at idle sometimes, and it seems to only get it when idling for a while, but as soon as i rev the engine, it goes away. What can cause this kind of check engine light?

[dodoni1]

you could be staring at a major repair, or your gas cap could be too loose (no kidding).
maybe you can get a code reader read and clear the fault codes.

[Rewmer]

As you suggested to someone else......

i suggest you use auto diagnostic tool check your car,

maybe you can try BMW ICOM A B C