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Re: [Shop-talk] PO174 - PO176 OBD CODES

To: "john niolon" <>, Shop-Talk <>
Subject: Re: [Shop-talk] PO174 - PO176 OBD CODES
From: "Paul Parkanzky" <>
Date: Fri, 7 Dec 2007 10:09:42 -0500
My experience (with TDI VWs) is that the MAF sensor cannot be brought back
from the dead.  That said, I would look at vacuum leaks first.  A quick
jiggle/tightening of all the fittings and clearing the code might fix it for


On Dec 7, 2007 10:07 AM, john niolon <> wrote:

> MY '03 Tahoe through a check engine light at me yesterday... reader shows
> po174 and po176 codes which are engine lean...both banks
> from my googling it seems that it 'might' be a dirty MAF sensor or vacuum
> leak
> or leaking hoses etc
> figured I'd start with the MAF sensor.
> what's the best thing to clean it with and procedure if more than just
> spraying it down good  ??  does it need to be removed from the MAF or
> cleaned
> in place...
> what ever happened to cleaning/setting your points with a matchbook cover
> and
> getting back on the road ??  I hate technology... oh and windows vista...
> john
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