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BMW 3-Series (E90 E92) Forum
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Diesel DEF ran out, won't restart
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08-04-2019, 08:19 AM | #1 |
New Member
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Rep 7
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Diesel DEF ran out, won't restart
Hello,
(2011 335d 148K miles) I am being punished for allowing my DEF tanks run out. Miles to no start came on and counted down from 200 to zero on the way home from a long trip. I added fluid to both tanks, did not have enough to fill full. My guess is that I filled the main tank 1/3 full and the other Car then restarted and ran a 50 mile countdown the next day. I was not worried, got to my destination, and filled both tanks full (3 1/2 gallons more). After that, the car will not start, and the miles to no start message remains at -- (zero). Further research indicated a reset at the dealer is needed when the tanks go to empty. EPA requirement. OK that makes sense. Don't like it but. . .. Off to the dealer on a flatbed. They'll do the reset right away, should take an hour. Then the bad news. Dealer can't communicate with the DDE, so I need a new one ($2,800.00). This could possibly fix the problem, but it might not. Next step is then replace DME, another $2,000. I've heard both of these acronyms,and thought they referred to the same component. I'm probably wrong. I'm not a fan of throwing thousands of dollars to see if that maybe might possibly fix. I do not see how the runout would have caused one or both of these engine management components to fail. Are there other components or sensors to check first? Thanks! Any thoughts or advice to approach this situation? |
08-05-2019, 03:09 PM | #2 | |
Kind of a Big Deal
171
Rep 857
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Quote:
The real fix is to preserve the emissions system's particulate trap (DPF) and delete the unbelievably under-engineered DEF system. This will require a tune and, while you're in there, get rid of the carbon-buildup-causing EGR system. I love BMWs, but as Mike Miller says, the last two years of R&D for a new model happen in the dealer's service bays. |
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08-06-2019, 11:22 PM | #4 |
Major General
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DDE and DME are two of the same except the DME would be installed on a gas engine and DDE on diesel. Sounds like they need to do a bit more diagnosis before they’re go and start throwing parts at it.
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08-08-2019, 08:58 AM | #5 |
New Member
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Rep 7
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That's what I had thought, and that's why I'm "uncomfortable" with the dealer's diagnosis and proposed solution. Thanks for the input. What I'm focusing on is potentially the level sensor in the DEF tank. If I had some test values with this component isolated. . .
OK with replacing the 1100.00 tank assembly if that is what's broken. |
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Tags |
dde, def, diesel, dme, e90 |
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