2009 Jetta TDI 6 speed wagon with 55,000 miles. Car seems to be running fine. OBD scan P0101 and P0102 both related to low voltage at mass air flow (MAF) Scanner clears check engine light until restart, but not glow plug light. Also, MFD says something about an "engine fault workshop". Nearest dealer is about 80 miles away. Any thought on what the issue is? Can I drive this to the dealer, or should I have it flat bedded? Also, best VW dealer in Norfolk/Virginia Beach or indy on the Outer Banks, NC? Any help is appreciated. Thanks.