I would second this. I had a bad oil sensor and dealer replaced it and reading is fine now.
Originally Posted by nhman
I would be hesitant to add more oil especially if the level hasn't changed from prior adds. Have the dealer do it. What if the issue is tied to a bad oil level sensor? By adding oil there's a risk of an overflow. Avoid any potential warranty issues and take it back to the dealer.
'11 M3 Coupe
'10 335i xDrive - Will be missed