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

Hello, I own a 2007 335i. After heavy acceleration, the engine went into degraded mode, and ran on 4 legs, shaking and losing power. But all this without any warning light. After diagnosis, this code appeared: 0029DC Knowing that I changed my BP pump for a walbro last week. My hp pump was changed last year. What do you think it could be? Injectors? Coils?

(Translated from French)

The 0029DC code is related to the cylinder injection cut-off, which could indeed indicate an issue with the fuel injectors or the ignition coils. Given the symptoms you've described, I would recommend starting with a check of the fuel injectors. You can do this by listening for a clicking sound from each injector while the engine is running. If one or more injectors are not clicking, they may need to be replaced. If the fuel injectors seem to be working correctly, the next step would be to check the ignition coils. You can do this by swapping the coils between cylinders and seeing if the problem follows the coil. 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?

I got a 25F500 code but my egr is physically deleted and also digitally deleted too. I only got the code when i physically put back the egr. After that i removed it again due to some inspection. No light in dash and deleted the codes numerous times but still comes up. Any suggestions?

The 25F500 code is related to the exhaust gas recirculation (EGR) cooler, indicating that the control deviation is too high. If you've physically and digitally deleted the EGR and the code still appears, it could be due to a software issue or a problem with the EGR delete process. Firstly, ensure that the EGR delete was done correctly. If you're confident it was, then the issue might be with the software. You may need to have the ECU reprogrammed or updated to fully eliminate the EGR from the system. 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?

Car throwing a DME MIXTURE 2 code 2010 X5 6 cylinder

The DME Mixture 2 code typically indicates that the fuel 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 oxygen sensor. 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 be with the oxygen sensor. 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?

Hello, BMW E90 318d N47D20c 2010. The same problem kept occurring until I replaced the intake air temperature sensor. Since then no error! Replacing the sensor takes about 10 minutes.

(Translated from Hungarian)

It's great to hear that replacing the intake air temperature sensor resolved your issue! If you have any further questions or need assistance with anything else, feel free to ask.