Car Popped A Check Engine Light...now Gone!

[BlexusGS]

I got a check engine light the other day ... with the car still running normal. My GF's father told me sometimes it has to do with a loose gas cap or something. I tightened the cap and the check engine light is still on! Now this morning I start the car up and no chec engine light! What gives???

Oh, one more question. What are some signs that your car sucked in water from the air intake pipe?

[SKperformance]

Look for water in the airbox. None in there none in the engine.

Get the code scanned to know what it was.

[BlexusGS]

Thanks for the reply SK. I do not have an airbox anymore, it's just an intake pipe leading to the throttle body. Also, can they still scan codes even if the check engine light isn't on anymore? I thought that the codes might have cleared themselves already? Also, I'm sorry about your father; please accept my condolences.

[SKperformance]

Thank you.

The codes are stored until they are reset or the battery is disconnected.