Where can I find the meaning of OBD codes for a 2001 VW Jetta? I have two codes showing, one says something about fuel trim and the other fuel air mixture. Is this related to the Mass Airflow sensor?

Thanks

 

Go to an auto parts store like auto zone or something. They have a book that tells you all the codes. I'm sure there's a website that would tell you, just goole it. Best bet is to just go to a place that checks codes, and then ask them to look it up real quick.