2001 Volkswagen Golf
Problem for Volkswagen 2001 Golf

2001 VW Golf 2.0 throwing error codes P0103 & P0172




By Kyyle on Jul 14, 2009

" "
I hit a pretty nasty bump on the interstate several weeks ago and Immediately afterward my check engine light came on.

The computer gave me the following codes when hooked to a meter:

-P0103: Mass or volume air flow sensor circuit high input
-P0172: System too rich bank 1

I replaced the Mass Air Flow sensor and reset the computer; my check engine light stayed off for a few days, but it's come back on and is throwing out the same two codes.

I hesitate to throw more money at the MAF if there's something else going on. Any ideas?
Comments:

Aug 26, 2009

- Definitely no vacuum leak; had the vacuum system hooked up to a smoke machine and no leaks presented. At this point my mechanic's best guess is a problem with the ECM, which is a whole new problem altogether.

Solution #1

posted on Jul 15, 2009
Somewhat Helpful)

PRINTGUY2000

Rank: Guru  Volkswagen Expert
Rating: 89%, 60 votes
Vacuum leak somewhere.
Possibly could be the O2 sensor (the one before the cat up front).
I'd search for a vacuum leak since you may have rattled something loose.
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Solution #2

posted on Nov 05, 2009
Not Rated)

dtyft

Rank: Apprentice 
Rating: 0%, 0 votes
Go after the Egr valve, if its sticking then there is a vacumn leak.
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