WilJungFan

Diesel BMW 3 Series model year 2014: Exhaust back pressure sensor defect and other symptoms

Dear community, I was a little worried about my old 2014 diesel BMW 3 Series with a whole bunch of kilometers (219340 km to be exact). The good old friend has been showing some strange symptoms recently. The thing is, it puffs black smoke out of the exhaust when I accelerate, and the check engine light is permanently on. The engine's performance drops, the engine runs irregularly and the DPF regeneration no longer works properly either. The fuel consumption is also quite high. I assume it has something to do with the exhaust back pressure sensor on the diesel particulate filter. I wanted to ask if anyone has ever had something similar with their car? What experiences have you had with the workshops? I had really bad luck with my garage last time! Thanks in advance for your help! Regards

(Translated from German)

The owner of a 2014 Diesel BMW 3 Series reported issues with the vehicle, including black smoke from the exhaust, a constantly lit check engine light, irregular engine performance, and problems with the Diesel Particulate Filter (DPF) regeneration. The owner suspected the exhaust back pressure sensor on the DPF might be the cause. Another participant, who had experienced similar issues with their BMW 1 Series, confirmed that the problem was resolved after repairing the DPF regeneration and the exhaust back pressure sensor. They advised the BMW 3 Series owner to have the vehicle checked at a garage.

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24 comment(s)

It is an older vehicle and they do not have a particle filter and also no regeneration system I would guess that the diesel pump is defective and sprays too much diesel.

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It is an older vehicle and they do not have a particle filter and also no regeneration system I would guess that the diesel pump is defective and sprays too much diesel.

Hi Mauro, While it's possible that a faulty diesel pump could cause over-fueling and black smoke, it's also important to consider other potential issues. For example, a clogged air filter could restrict airflow, causing the engine to run rich and produce black smoke. It would be a good idea to start with checking the air filter and then move on to more complex components like the diesel pump if necessary. Please keep us updated on your progress. Do you have any other questions?

What is known about the error code

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What is known about the error code

Hi Lirise, Could you please provide more details about the error code you're referring to? The more information you can provide, the better we can assist you.

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BMW

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