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      12-20-2019, 09:18 PM   #1
etr2016
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Error Code P2400 (DMTL)

About 1500 miles and two years ago I got an error code for a DMTL pump (something different than the P2400 I just got). I replaced the dmtl pump and canister filter myself. A little while later the error came back. The dealer replaced the DMTL pump and canister again (they were nice and did a warranty claim on the ones I previously bought online from another BMW dealer). Anyway, i literally picked up my car from the dealer today (had the blower recall done), drove the car for about an hour, turned it off, then back on, and voila....the lovely amber glow of a SES. Super frustrating. I swear the dealer had previously mentioned I might need a new fuel tank if the dmtl/canister repair didnt work! I've owned the car for about 4 years but the previous owner did let it sit a while and I'm wondering if there was something with fuel contaminants (that mostly makes no sense here, but I have no idea what else it could be).

One odd note - I stored the car for 7 months and before I did so I topped off the fuel tank. I swear the car was a bit under full when I fired it up. Not sure if there is an issue with a seal around the tank allowing fuel to evaporate?
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Last edited by etr2016; 12-20-2019 at 09:26 PM..
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      12-23-2019, 01:46 PM   #2
etr2016
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Turned out to be another DMTL pump (my third!). After the pump was replaced they (indy shop) ran some tests and all good. They think the fact my car sits so long and there could have been some older stale gas in the tank kills the pump. no idea if this is true, but it was a $180 fix for the new pump install....so not horrible. i'm going to run this tank dry and refill with some fresh gas and run that out.
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      12-23-2019, 10:53 PM   #3
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Quote:
Originally Posted by etr2016 View Post
Turned out to be another DMTL pump (my third!). After the pump was replaced they (indy shop) ran some tests and all good. They think the fact my car sits so long and there could have been some older stale gas in the tank kills the pump. no idea if this is true, but it was a $180 fix for the new pump install....so not horrible. i'm going to run this tank dry and refill with some fresh gas and run that out.
Aside from the error code you received....what were the symptoms?
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      12-26-2019, 12:57 PM   #4
etr2016
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No symptoms that I could tell. BMW dealer recommended I replaced the gas tank. For good measure, I'm going to have a local shop smoke test the fuel system and tank a peak inside the gas tank to see if they see anything.
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      01-07-2020, 11:33 AM   #5
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I would be very surprised if there is any issues with the tank. Millions of examples of old junk yard cars that have sat for eons having fuel in the tank that works just fine.

Pump was the answer.
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      01-07-2020, 12:42 PM   #6
etr2016
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Well, I'm having the tank replaced anyway as three places I've called all agreed that it's not normal to go through this many DMTLs and the fuel tank would be the most logical cause of the issue. Who knows, maybe the issue will come back but I'm not going to keep replacing the DMTL without trying to determine the root cause of the issue.
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