Car has 94,000 miles on it. The check engine light came on while driving on highway @ 65 mph. It's not flashing. Engine is running fine, doesn't miss, no lost power, has plenty of oil. I've driven 50 miles since the light came on. Just had the timing belt, water pump replaced.I am 1000 miles away from home and it's sunday in the midwest! Any ideas what the problem could be?? thanks!
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.
Mine was related to the gas cap not sealing, a cheap fix
03 a4 avant 1.8t
Mine is a 2003 Audi A4 1.8 94,000 miles on it. Couple of days ago the Check Engine light came on. I went to advance auto parts, read the a code, it was "P0304 Cylinder 4 Misfire Detected". Just bought it about a week ago. Today the Check engine light comes off. Should i still worry or bring it back to the dealer where i bought it from?
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