I was driving down the road and hit this dip and then the dash lights flashed and the car just shut down it may be a oxygen sensor or a knock sensor the engine size is a V6 with 143000 miles and its a 1993 Audi s90 if you got any answers or comments please feel free to reoly

SOURCE: Check engine light/2004 Audi A6 Quattro/3.0L

hi, if you still have time to take it back to the dealer. take it to them.

SOURCE: 2003 Audi A4 1.8T Check Engine light on

The CEL means there is a Diagnostic Fault Code stored in the Engine Control Unit. There are 1000's of DTC's, so you will need to have it read by a Code Reader. Auto Parts stores like Auto Zone, Pep Boys, perhaps even Advanced Auto often will read the code for you; but by law they cannot clear the codes. Many codes do not cause drivability problems, severe ones will trigger the ECU to run in a Limp Mode, which would require repair work before any trip longer than a few miles. Hope this is helpful.

SOURCE: 2003 audi a4 1.8t ECU/emission control system warning light flash

No I am a mechanic at Audi. The problem is that the the air flow to the central tappets may be causing the air flow sensor to trip and that is why. Try putting a small amount of WD40 into the petrol and that will work, its a very common problem.