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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 June 21st, 2017, 19:32   #1
jrm
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Default Regen Urine smell + wife ultimatum

its been over a week since the gen2 fix, and now the car is in full regen every other night we pull in the garage- has anyone smelled the regen exhaust??? It used to smell like bleach but now it smells strait up like Hot Pee after eating asparagus, i assume its from the increased Urea injection but the wife has given me a hard choice after her coworkers said she is driving a catbox- full delete and skip the extended warranty or buy her a new car! I just shot a email off to Malone for a fix, but man she is right, that exhaust during regen is completely embarrassing to say the least!
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Old June 21st, 2017, 19:59   #2
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Mine doesn't smell....
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Old June 21st, 2017, 20:26   #3
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A delete will be stinky as well if parking in a garage or standing around the car while it runs. Would hate to see you spend the money on a delete and have her still not like it. Not sure what to do in that situation. Sounds like you should take over the passat and get her something else lol
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Old June 21st, 2017, 21:06   #4
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me taking the passat is prob the right thing to do, Malone and rawtec have a tune + cat setup that reduces the raw diesel smell, she doesn't mind the exhaust from my 12v cummins though
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Old June 22nd, 2017, 06:22   #5
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No smell from my 2015 after the Phase 1 fix !
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Old June 22nd, 2017, 06:30   #6
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Quote:
Originally Posted by jrm View Post
me taking the passat is prob the right thing to do, Malone and rawtec have a tune + cat setup that reduces the raw diesel smell, she doesn't mind the exhaust from my 12v cummins though

You sure some cat isn't spraying and marking his territory on your engine? I ask simply because no one else has reported the same issue. I will note, however, women's sense of smell, especially for urine, has much more highly evolved.
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Old June 22nd, 2017, 06:38   #7
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You might want to have the little woman checked....
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Old June 22nd, 2017, 07:24   #8
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Oh man. I agree with 767wrench that it probably makes sense for you to take over the passat. Then you can decide if you prefer asparagus pee or diesel exhaust fumes.
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Old June 22nd, 2017, 08:23   #9
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How about complaining to the dealer?

For the Gen 2s maybe the SOx trap is kaput, now that you performed the fix, they should be on the hook for fixing the system with the warranty.

I bet VWoA and VWCC would love to track down "teething issues" on these gen 2 cars.

How many miles on the car?
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Old June 22nd, 2017, 13:12   #10
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Quote:
Originally Posted by jrm View Post
its been over a week since the gen2 fix, and now the car is in full regen every other night we pull in the garage- has anyone smelled the regen exhaust??? It used to smell like bleach but now it smells strait up like Hot Pee after eating asparagus, i assume its from the increased Urea injection but the wife has given me a hard choice after her coworkers said she is driving a catbox- full delete and skip the extended warranty or buy her a new car! I just shot a email off to Malone for a fix, but man she is right, that exhaust during regen is completely embarrassing to say the least!
Very interesting report. I actually expected the smell to be more noticeable with the increased dosing and undersized SCR equipment (my own theory). What you're getting is more free ammonia escaping the system.

Before you go down the delete/tune road, address your concerns with Volkswagen, the class council and the EPA. IMO, the EPA should be looking into the ammonia exhaust concern.
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Old June 22nd, 2017, 21:31   #11
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its only while its in regen, normal driving and idling is just fine- but even I smell it very strong when we had it idling waiting for regen to finish while unloading grocery's
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Old June 23rd, 2017, 04:52   #12
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wonder if the dosing is ramped up during regen, vs normal consumption regular operation.
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Old June 23rd, 2017, 07:30   #13
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Quote:
Originally Posted by jrm View Post
its only while its in regen, normal driving and idling is just fine- but even I smell it very strong when we had it idling waiting for regen to finish while unloading grocery's
Maybe I'm dense, but how in blazes can I tell that my engine is in REGEN mode ?

Last winter while I was in Mexico I used to run the car in " S " or even in manual mode to try and force regen since Mexican Diesel is still LSD and not ULSD. That apparently will change this coming December.
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Old June 23rd, 2017, 09:54   #14
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its only while its in regen, normal driving and idling is just fine- but even I smell it very strong when we had it idling waiting for regen to finish while unloading grocery's
Smells like too much def is being burned which is creating ammonia. Maybe it's the injector or maybe it's the DEF line that is damaged and dumping DEF on the hot exhaust when the line is pressurized.

Probably best to get the dealer to look at it as ammonia can be dangerous when inhaled.
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Old June 23rd, 2017, 10:42   #15
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Quote:
Originally Posted by Jetta_Pilot View Post
Maybe I'm dense, but how in blazes can I tell that my engine is in REGEN mode ?
I think the easiest way to tell is your idle RPMs will be a bit higher than usual.
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