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LisbethFisch

Problems with BMW 5 Series diesel: Black smoke, high fuel consumption and uneven running

Hello, I have a problem with my 2008 BMW 5 Series Diesel, which has already driven 301,871 km. When accelerating, black smoke comes out of the exhaust, the check engine light is on and the engine switches itself off. It performs less, runs unevenly, jerks when accelerating and consumes a lot of fuel. The engine stalls at idle and there is a strong smell of exhaust fumes. I suspect that it might have something to do with the fuel pressure sensor, which measures the fuel pressure and transmits it to the engine control unit. Has anyone had similar problems before and how did it go at the garage? Last time they made me pay quite a bit and I want to be a bit better prepared this time. Thanks in advance for your help!

(Translated from German)

Summary of the thread

The 2008 BMW 5 Series Diesel is experiencing issues such as black smoke from the exhaust, high fuel consumption, uneven running, and stalling at idle. The owner suspects the fuel pressure sensor might be the cause. Other participants suggest that incorrect values from the fuel pressure sensor could indeed cause these problems, and that the juddering could indicate issues with the injectors or the high pressure pump. The recommended solution is to have the car professionally diagnosed and possibly replace the sensor.

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15 comment(s)

LisbethFisch (community.author)

Thank you guys, you've really helped me. It's reassuring to know that it's probably nothing more serious. And it also seems that the problem can be fixed quite cheaply. I'll just go to the garage now and hope for the best. Thank you for your support!

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ViktorLeman

Hi, I had a similar problem with my 2011 BMW 7 Series. At the last workshop visit, we had to look at the fuel injection. Incorrect values from the fuel pressure sensor can definitely cause black smoke and increased fuel consumption, as the engine electronics can mess up the fuel mix. But don't worry, if it was something serious, other symptoms would occur. The juddering could also indicate a problem with the injectors or even the high pressure pump, but this is relatively easy to fix. The mechanics should be able to get a good handle on your problem. Hope this helps you!

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LisbethFisch (community.author)

Hey, thanks for your quick reply! Your info reassures me a bit, at least it sounds like it could be something that the guys at the garage should be able to get to grips with quickly. But as you know, you always want to be on the safe side and find out as much as you can beforehand. Do you happen to remember how much it cost you and whether anything else came up afterwards that you had to have fixed?

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SiDre

Hi, I just came across your thread and would like to share my experience. I had the fuel pressure sensor fixed on my car, a fancy Audi A6. Since then I've never had a problem with it again. The workshop guys did a great job. That's what I call service! It cost me around €150 to get the sensor fixed. Everything was back to normal afterwards! Hope this helps you a bit with your preparation. Good luck!

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EwaldWag87

Hi everyone, I agree with the others here. The fuel pressure sensor could indeed be the problem. With the mileage on your car, it's quite possible that some parts are showing wear. If the sensor is giving incorrect data, the ECU may not be burning the fuel optimally, which could lead to the problems you describe. A proper diagnosis and possibly replacing the sensor could solve your problem. But as I said, it's best to go to a reliable garage and have the situation assessed by professionals. Good luck with that, and hopefully you'll soon be driving again without any problems!

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tonymontana

29E2 Had Sensor disconnected, after working on motor

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CarlyMechanic

community_quotation:

community_author_wrote_on

29E2 Had Sensor disconnected, after working on motor

Hi tonymontana, it seems like you're dealing with a fault code 29E2, which is related to the fuel injection system. If you've recently disconnected the sensor and now you're experiencing issues, it's possible that the sensor was not reconnected properly or it might have been damaged during the process. I'd recommend checking the connection first, make sure it's secure and the wiring is not damaged. If the problem persists, you might need to replace the sensor. Please update us on your progress. Do you have any other questions?

Hassan

Moin i have problem in my bmw 3 series gt 2014 318d the wheel pressure plusbility can jmd help me with this?

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CarlyMechanic

community_quotation:

community_author_wrote_on

Moin i have problem in my bmw 3 series gt 2014 318d the wheel pressure plusbility can jmd help me with this?

Hassan, it sounds like you're having an issue with your tire pressure. First, check the tire pressure on all your tires and make sure they are inflated to the recommended PSI (Pounds per Square Inch) as stated in your vehicle's manual or on the sticker inside the driver's door. If the problem persists, it could be a faulty tire pressure sensor. In this case, I would recommend having it checked by a professional mechanic. Please keep us updated on your progress. Do you have any other questions?

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