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      07-14-2017, 09:11 AM   #1
TigerTrip
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Drives: 2007 BMW 335i
Join Date: Feb 2017
Location: SC

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07 335i - DMTL/Fuel issue

Hey everybody, first post here. I've had my 335i for about half a year and it has given me problems almost the entire time. I've tried to research on the forum for a few weeks to figure out what the problem is, but I haven't found anything that addresses this specific issue. I've taken it to a local shop that specializes in European cars, but they failed to fix it after 3 attempts. I don't really want to take it to the dealership because they'll probably charge me what the car is worth to fix it. If someone has recommendations or advice on what to do, that would be great. Let me know if there is any additional information that I've left out. I am able to do a good bit of work myself if proper guides or instructions are available, but I am not good at diagnosing an issue.

My car:
07 335i
93k miles
JB4 tune - I run map1
Only upgrades are intake and catless downpipe

The codes:
2F9E - Thermal oil level sensor (believe this one is just due to needing an oil change, which I'm doing tomorrow)
2A17 - DMTL module, system error/failure (this is the reoccurring code that will not go away)

The symptoms:
About 3 months ago, the car was having some bad misfires and O2 sensor failures. I replaced the spark plugs, swapped the coils and then replaced the O2 sensors and got a catless downpipe.
The car used to have trouble filling and the gas pump would auto-stop several times while filling.
It also used to cut off at low RPM in low gear... for example, when rolling into a parking lot around 2000rpm in 2nd gear. This has gotten less frequent, but it still happens sometimes. The car will also cut off when sitting still sometimes.
The most prevalent symptom is that at low RPM, in low to mid gear (1-4), and usually when driving uphill, the car lunges very badly. It feels like I just brake tapped hard but it is definitely something with the engine.

All of the current problems sound like a fuel issue to me. Could this be related to the HPFP?

What I've done:
I've had the dmtl sensor replaced twice and replaced the charcoal canister twice. Both of the second times were in warranty because the first ones failed. The canister had to be replaced because it had gotten fuel in it.

Thanks in advance for the help.
Appreciate 0
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