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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW Passat Family (NMS and B7) TDIs (2012+)

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 December 4th, 2018, 10:25   #1
Join Date: Jul 2011
Location: Illinois-Central
Default DEF Notification CEL

2015 Passat TDI SE, 123,000

Friday the DEF notification came on 600 miles before no start. I just recently had the oil changed so logically I figured the dealership forgot to top off the DEF fluid. Stopped in Saturday to have it topped. Notification never came on Sunday.

Now yesterday Monday, it's back 500 in range and now accompanied by a CEL. I did a bit of research in the forums and came across a few items, possible NOX sensor, possible DEF heater etc....

Does anyone have a few suggestions in diagnosing and repairing this annoyance without having it expire, towed to the dealer and pay a big chunk of change.

Thanks in Advance for your assistance.
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Old December 4th, 2018, 11:03   #2
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Join Date: Aug 2009
Location: Henderson, NV
Fuel Economy: Check my Fuelly Tag for most up-to-date numbers

Isnt your car covered under the Dieselgate extended warranty?

Take that thing in and dont pay a dime. Let Vw fix it.
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Old December 5th, 2018, 07:11   #3
Join Date: Jul 2011
Location: Illinois-Central

It appears that it is covered under the extended warranty as all diesel exhaust fluid components are specified in the extended warranty.

Thank you for the reminder.

I do apologize for the multiple posts as I was on my phone and had not realized that it posted as the server was not responding.
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Old December 6th, 2018, 09:38   #4
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Join Date: Aug 2009
Location: NH

Let me get my crystal ball and see what it says your CEL is for.

asking the internet what a CEL could be is as useful as asking which rocky movie is the best, or something trivial.

Give us the codes and we'd be able to help, until then I'm just going to go out and wildly guess you have a failed DEF heater/sensor in the tank.

Good luck!
Hers: 2015 Passat SEL (NOS) w/ VW fix and Malone Stage 2 (low torque for DMF shudder).
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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