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VW Passat Family (NMS and B7) TDIs (2012+) Discussion area for the 2012+ Passat TDI (North American and rest of world versions versions). The North American model was previously codenamed NMS (New Midsize Sedan) and the version the rest of the world gets is sometimes referred to as B7.

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Old March 9th, 2017, 18:58   #1
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Join Date: Apr 2004
Location: Canada
Default anything to check repair after getting exhaust flap code

just picked up the exhaust flap code,on my 13 .
anyone have an idea what we can do first ,like lube something, clean anything.
I have a vag com, and tried an output test, but get aborted for safety on the test..
P048C 00 [237] - Implausible Signal
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Old March 9th, 2017, 19:16   #2
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Join Date: Jul 2013
Location: Oregon
Fuel Economy: 42/52

quick reply while on the clock- yes, just pull It apart and wire brush the crusty carbon off it- shoot it with some high temp lube (graphite) and your good to go. A few buried threads about this as well
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Old March 10th, 2017, 06:17   #3
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Location: White mts, NH

Our was replaced under the extended warranty provided by VW on this part @ 32,000 miles, 3 years 3 months, no quibbling by the dealer in Barre VT

Last edited by Skimax; March 10th, 2017 at 16:31.
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Old March 10th, 2017, 06:33   #4
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Join Date: Apr 2004
Location: Canada

13;s even though they are the same valve, arent in the recall I read.
my code is not a stuck open etc, mine comes back as signal so thinking connection issue?

Last edited by laminated; March 10th, 2017 at 06:48.
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Old March 17th, 2017, 09:58   #5
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Join Date: Aug 2009
Location: NH

If the valve isn't fully opening or closing when the ECU commands it and the system isn't seeing the desired back pressure in the EGR, it'll say its a signal issue.

I'd bet dollars to donuts its sticking and if you keep driving it it will eventually stick open.
Hers: 2015 Passat SEL (NOS) w/ VW fix and Malone Stage 2.
His: 2017 Alltrack SE, waiting for TSI to TDI conversion kits to be released.
Bought back 2010 Sedan, cog swapper, build date 07/09, BB 6/7/16. 2012 Passat, Roof+Nav, build date 05/12, BB 7/11
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