so after i fill my 99 a4 quattro with gas it wont start properly. i turn the key, the engine revs and turns but doesnt catch. or it will catch but immediately stall. after 15-30 minutes it will start. usually the engine turns for awhile, i leave the key forward, and it eventually catches.

so i vag it and get these codes:

16544 oxygen (lambda) sensor b2 s2: no activity
p0160-5-10 intermittent

17544 fuel trim: bank 1 (add): system too lean
p1136-35-00

17546 fuel trim: bank 2 (add): system too lean
p1138-35-00

16839 evap system:large leak detected
p0455-35-00

 

i just read the recalls and TSBs and i think there's a recall for the A4 with a fuel problem. not sure, might wanna double check it

 

just double checekd it. there's nothing for your car. that was just on my car

 

Clear the codes and see if they return.
P0455 could be caused by a loose or faultygas cap.
You might have a vacuum leak, causing the lean codes.

 

these tsbs seem similar.

https://www.audiforums.com/recalls-a...150101/TSB.htm

https://www.audiforums.com/recalls-a...150102/TSB.htm

mechanic says its likely a solenoid isnt properly firing so the engine is flooding.