Question about 2001 Volkswagen Golf

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2001 VW Golf 2.0 throwing error codes P0103 & P0172

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?

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  • Kyyle 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.

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Go after the Egr valve, if its sticking then there is a vacumn leak.

Posted on Nov 05, 2009

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  • 257 Answers

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.

Posted on Jul 15, 2009

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Posted on Jan 02, 2017

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