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Old 11-09-2014, 05:43 PM
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Cool Build Date with no CEL's

Looking to see if there's a relationship between build dates and CEL's related to DEF, mine was build Nov 20/2013 and CEL pretty much full time.

If you have a WK2 diesel and never seen a CEL , would you mind posting build date (on sticker of drivers side door) and mileage ?

Maybe it's random but who knows!.

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Old 11-09-2014, 08:05 PM
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Build Date with no CEL's

Built June 1st 2014 @ 04:49am.

Currently no(never) CELs, 13,000 miles.

Limited EcoDiesel, AD1, trailer tow, navigation, body color mirrors, fold flat psg seat & Doms DEF plate.


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Old 11-09-2014, 08:47 PM
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Re: Build Date with no CEL's

All builds have the same Catalytic Converter.

I have a theory: The Cat has an NOx sensor and when it or the Cat fails, it may not call for DEF properly. The DEF flow is then too low and chrystalizes, clogging the injector and possibly pump over time. The shutdown warning comes and off to the dealer we go. The dealer cleans the DEF system and replaces the injector and maybe the pump. The Cat is still going bad and P20EE eventually occurs. The new flash increases DEF flow periodically to keep it from clogging but the Cat needs replacing and P20EE reoccurs even after resets.

And we wait for the new Cat.

This scenario fits what most of us are seeing.
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