2006 BMW 325i Q&A

2006 BMW 325i Question: I can't figure out warning light on dash it's a box with a bit of slant

square box with taller pole on right side there's something in the middle but I can't remember it and it wouldn't come on just now but it came on two days ago yellow and doesn't show up when I click through the computer service information with spark plugs tires etc -
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