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Q:

Check Engine light on. Hesitation after stop but not always. on 2003 Audi A4

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The car runs well at normal driving speeds. After a stop there is sometimes a hesitation or stall before the normal acceleration begins. The Check Engine light is on. The shift indicator either flashes or stays constant in a red bar instead of the D for Drive being lit in red. The stall or hesitation is not consistant and is random.
(2) Answers
the trans display is saying there is a fault in the transmission. when a trans faults it goes into limp mode which can cause the stall and sluggishness. the check engine light may be on as a "mil" request saying check trans. either way the faults need to be read and evaluated by a tester and diagnostic technician. there are too many reasons to speculate what happened to your car without knowing the fault codes.