"DEF" Exhaust Fluid Contamination - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 08-24-2012, 09:08 PM Thread Starter
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"DEF" Exhaust Fluid Contamination

Hello, I'm a new member and am hoping someone can help me. I have a 2011 F250 4 x 4, 18,000 miles. No problems to speak of until my last fill up at Walmart. The engine icon came on immediately when ignition was turned on and never went off. I called dealer and after trying several un-productive things, took in to have serviced. They told me it was the DEF fluid was contaminated. The instrument message never said that just the engine icon appeared. They asked if I had put anything in other than DEF fluid and I said no. I have only used Blue DEF which I get at WalMart or Advanced Auto and have my receipts to back it up. They insinuated the warranty might not cover the service required which my response was not good. After reading some posts out there it looks like this is not an uncommon problem as the dealership suggested. Anybody have any ideas for me? Thank you, Bob
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post #2 of 5 (permalink) Old 08-25-2012, 03:33 AM
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I hate stuff like this that the owner of the truck gets blamed because they can't figure it out.
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post #3 of 5 (permalink) Old 08-25-2012, 05:55 AM
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Open up your manual and find the number for Ford Motor Company. If you have a dealer not providing you with good service call and explain your problem to fomoco. I did that and got some safety work done as warranty even though it was out of warranty on my wife's Saturn outlook. My uncle works for the general and you would be surprised how badly the fords, gms, chryslers want to get their brand loyalty back. The Kias, Hondas, and toyotas have been eating their lunch. Be calm and courtesy with them and see what happens.


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post #4 of 5 (permalink) Old 08-25-2012, 02:32 PM
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Heres the thing with DEF, contamination can occur while just filling the tank up. You don't have to 'add' anything to contaminate the product, sometimes it just happens from debris around the filling hole. I have been trying to find articles on this stuff since I sell it at my place of employment, like everything else I believe you get what you pay for and there may be, with the cheaper lines, been contaminated from the bottling line from whomever makes the UREA.

Could this be from something that is outside of the bottle? possible, could it be from something that had gotten into the bottle before it was sealed? possible. its all about quality control both from the manufacturer, the dealer tech and the end user!

I sell at work Valvoline's version, we used to have KostUSA, Autozone sells Sky Blue and I am not sure what Oreilly or Napa or Advanced offers.

Jim "Iron Giant" Fahlin ~ A high performance car is like a guitar, you have to tune it to achieve your best operation and pull ahead of the competition.

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post #5 of 5 (permalink) Old 08-25-2012, 08:27 PM Thread Starter
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I am very careful when putting anything in to the tanks and the outside is very clean anyway. I feel certain the contamination, if there is any, came from inside. After consulting with an area expert diesel mechanic here in town, he tells me of all the issues he has had regarding the error message on DEF contamination, it has always been debris inside the tank from factory. He said the factory doesn't properly clean the tank after grinding down the seams. Just one little plastic particle can clog the sensor. I have seen or noticed faulty NOX sensors have been a problem with some.

After all this, I heard back last night from the dealership and the are replacing a failed DEF pump! Imagine that!

Thanks for all the responses, I will keep you "posted"( no pun intended).
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