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NLenz92

Problems with BMW 6 Series Diesel (2008): Black smoke, loss of power and possible defective charge air temperature sensor

Jerking on acceleration

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Loss of engine power

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Check engine light on

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Poor fuel economy

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Loud hissing on acceleration

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Black smoke from exhaust on acceleration

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Whistling noise

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Strong exhaust smell

Hey guys, have you ever had any problems with your BMW 6 series diesel (built in 2008), for example black smoke on acceleration, check engine light, loss of power, jerking, loud hissing, poor fuel consumption, strong exhaust smell and whistling noise? I think maybe the charge air temperature sensor could be to blame, but I'm not sure. How did you get a problem like this fixed at your garage and what was your experience? What tips can you give me to narrow down the problem and fix it? I am grateful for any help!

(Translated from German)

18 comment(s)


TerryWag

Hey, I had a similar problem with my BMW 5 series diesel (built in 2006). My car knowledge is not particularly in-depth, let's call it rudimentary experience. I took my car to my regular garage and had a comprehensive diagnosis carried out. Surprisingly, it wasn't the charge air temperature sensor that was faulty, but the evaluation electronics (engine control unit). The repair costs amounted to 1000 euros. I would recommend that you have this checked in a workshop. Are there any particular symptoms or other special features? The more information I have, the better I can help you! Greetings!

(Translated from German)

NLenz92 (Author)

Hey, thanks for your reply! Well, so I have the same problems plus rain water getting in and a leak in the windshield. It's been running like this for a while now, and that's exactly why I've got a total of 259763 km. My last service was also some time ago, which may not have been the best idea. I've thought about your advice and think it's a good idea to have my car thoroughly checked by a garage. It sounds really expensive though, I was afraid of that! But what won't you do for your dream car, right? Thanks again! I really appreciate you taking the time to reply. Best regards!

(Translated from German)

Best Answer

TerryWag

Hey, no problem, that's what we're here for! 259763 km is quite a number, and I suppose all sorts of things can go wrong. You seem to be really driving your BMW 6 Series diesel! I've heard less about the rainwater and the windshield leak, but that could of course also be responsible for some of the symptoms, such as the whistling and hissing. Yes, a thorough inspection is probably the best way to find out what makes your car tick, even if it is expensive. But as you say, what you won't do for your dream car! When you're at the garage, have a look at the intake manifold and intake manifolds too. These were the main culprits for the loss of power and the strong exhaust smell in my old diesel 5 Series. This could also be a reason for the high fuel consumption. I hope I was able to help you! Let me know how it goes! Stay tuned and drive safely!

(Translated from German)

NLenz92 (Author)

Hey, thanks for all your tips and suggestions! You're right, my baby already has a few kilometers on the clock and I love driving it. It's like a second home to me. The windshield leaks and rainwater getting in are really annoying. I hope it can be fixed at the garage. However, I'm a bit surprised that they could cause whistling and hissing. Interesting! I will definitely have the intake manifold and intake ports checked. Hopefully this will solve the problem with the power loss and strong exhaust smell. And hopefully it will reduce the fuel consumption! I'll definitely keep you posted on how things progress. Your help is very valuable to me! See you then! Drive safely!

(Translated from German)

Dennistetzi

Hello I have an e90 330i m53 engine I have a problem here When I plug in the lambda sensor bank 1 the car goes into emergency mode when I plug it in the car works normally but when I plug in the lambda sensor and unplug the mass air flow sensor the lambda sensor works I just can't figure out what it can be I hope you can help me Mfg

(Translated from German)

CarlyMechanic

@Dennistetzi

Hello I have an e90 330i m53 engine I have a problem here When I plug in the lambda sensor bank 1 the car goes into emergency mode when I plug it in the car works normally but when I plug in the lambda sensor and unplug the mass air flow sensor the lambda sensor works I just can't figure out what it can be I hope you can help me Mfg

It sounds like you might have a conflict between your lambda sensor and your mass air flow sensor. This could be due to a variety of reasons, such as a faulty sensor, wiring issues, or even a problem with your car's ECU. I would recommend starting with the simplest check first: inspect the wiring and connectors of both sensors for any visible damage or corrosion. If everything looks fine, you might want to consider having both sensors tested to see if they're functioning correctly. If both sensors are working as they should, the issue might be with your car's ECU. In any case, due to the complexity of these systems, it might be best to have a professional mechanic look at it. Please keep us updated on your progress. Do you have any other questions?

Rasskazz

Bmw N57d30b fault codes 28D600 And 25F500. Where to check the problem

CarlyMechanic

@Rasskazz

Bmw N57d30b fault codes 28D600 And 25F500. Where to check the problem

The fault code 28D600 is related to the charge air temperature sensor, indicating that the signal is outside the permissible range. The fault code 25F500 is related to the exhaust gas recirculation cooler, indicating that the control deviation is too high. For the 28D600 code, I would recommend checking the charge air temperature sensor for any visible damage or loose connections. If it looks fine, you might need to replace it. For the 25F500 code, you should inspect the exhaust gas recirculation cooler and its associated components. Check for any leaks, blockages, or damage. If everything looks fine, the issue might be with the EGR valve itself. Remember, these are just starting points for your investigation. If these checks don't resolve the issue, it would be best to have a professional mechanic look at it due to the complexity of these systems. Please keep us updated on your progress. Do you have any other questions?

FlorjanShehu

0029E1 mixture control 2 Hello, I've got a BMW E92 335i N54 DCT. Recently the car has been showing a check engine light and after I checked it with the carly scanner it gives me a 0029E1 mixture control 2 I've changed the oil, spark plug, coils, walnut blasting, almost everything new I've done a full deep in detail service of the car What can be the possible issue here? One night i kept it idling for almost 35-40 minutes and I was thinking maybe my pcv valve might've gone but i'm not sure Any ideas ? Thank you.

CarlyMechanic

@FlorjanShehu

0029E1 mixture control 2 Hello, I've got a BMW E92 335i N54 DCT. Recently the car has been showing a check engine light and after I checked it with the carly scanner it gives me a 0029E1 mixture control 2 I've changed the oil, spark plug, coils, walnut blasting, almost everything new I've done a full deep in detail service of the car What can be the possible issue here? One night i kept it idling for almost 35-40 minutes and I was thinking maybe my pcv valve might've gone but i'm not sure Any ideas ? Thank you.

The 0029E1 code is related to the fuel mixture control, indicating that the mixture is too lean. This could be due to a variety of reasons such as a vacuum leak, a faulty fuel injector, a failing mass air flow sensor, or even a faulty PCV valve as you've suspected. Given that you've already performed a detailed service on the car, I would recommend starting with a check for vacuum leaks. You can do this by inspecting all vacuum lines and connections for any signs of damage or loose fittings. If you don't find any vacuum leaks, you might want to consider having the fuel injectors and the mass air flow sensor tested. If these components are functioning correctly, then the issue might indeed be with the PCV valve. Remember, these are just starting points for your investigation. If these checks don't resolve the issue, it would be best to have a professional mechanic look at it due to the complexity of these systems. Please keep us updated on your progress. Do you have any other questions?

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