Last week I wanted to go on vacation and shortly before that the misery started. It all started with the DPF warning light. Now my car is working again, I was able to solve all the problems myself at home. Here is a video with all the steps in great detail. Maybe this will help you save thousands of euros. Additional information, corrections and answers at https://www.pfuisi.org/video/reparier... DPF - #DPF - Diesel Particulate Filter - Jump marks with affiliate links marked with (*) 00:00 0. Start 1. Theory 05:39 a. What is the CAT? 10:04 b. What is the #DPF? 13:19 c. Exhaust gases 18:10 2. Causes of errors 19:31 a. Short journeys b. Exhaust temperature is not reached c. EGR valve coked (exhaust gas recirculation not working) d. Does the wrong oil/oil interval have an influence? b. Defective thermostat d. Injectors defective e. Contaminated fuel or biodiesel f. Glow plugs 3. Parameters for regeneration 23:12 a. Vehicle must be moved - at least 60 km/h b. 10 liters must still be in the tank c. Operating temperature must be reached d. Exhaust temperature must be correct e. No errors relevant to the exhaust system must be present f. Exhaust pressure 4. Unlock secret menu 25:19 a. Enter the secret menu b. Unlock the sub-items c. Lock Off point 19 d. Coolant temperature check point 7 b. 10 liters must still be in the tank c. Operating temperature must be reached 5.a Where are the components in the engine 28:02 a. DPF and catalytic converter b. EGR valve c. EGR cooler d. Sensors 5.b Removing the DPF 32:26 a. Remove engine cover b. Dismantle air filter housing c. Disconnect lamp sensor, pressure and temperature sensor d. Loosen V-clamp between DPF and turbo e. Remove underbody panel f. Unscrew the bracket from the DPF (trick: nut instead of Torx) g. Unscrew the exhaust clamp f. Remove the DPF 36:55 6.a Cleaning the DPF 37:22 a. Removing the sensors b. Basic cleaning c. Which cleaning agent is the right one? 38:05 DPF Cleaner Additive? Use DPF cleaner when installed? (* https://amzn.to/3WpqcWX ) 38:18 Home remedy 1 - YES 39:08 Home remedy 2 - YES 40:46 d. First chemical cleaning e. Soot particles 46:22 6.b Cleaning the DPF 49:05 a. Second chemical cleaning b. Brown slag? 51:17 6.c Cleaning the DPF 53:35 a. Drying 6.d Replacing the flexible pipe (* https://amzn.to/3yjvDie) 55:09 a. Welding work b. Flexible pipe is installed - 55:32 6. Paint the DPF 56:15 a. Looks like new! 7. Reinstall #diesel particulate filter 59:00 a. Connect V-clamp DPF to turbo b. Mount brackets c. Connect exhaust system b. Connect sensors 8. Start the engine 1:02:57 a. Start the engine b. Read out errors 9. Read out OBD errors (* https://amzn.to/3WnuzC5 - Affiliate Link ) 1:03:31 a. INPA b. Bosch c. EDIABAS Toolset 32 ​​b. Rheingold 10. Remove, clean and install EGR valve 1:04:27 a. DPF is cleaned b. The error still cannot be reset c. AGR error ;( b. #Remove AGR e. Clean AGR f. Repair air hose 1:08:50 10.b Install EGR valve 1:09:36 a. Screw on b. Top up coolant 11. FRM - footwell module BMW 1:10:51 a. Disconnect battery (error still there) b. Error: KOMBI A3C1; A3B4; A559 c. Remove FRM d. Solder serial interface e. Install/flash new firmware on FRM f. RHEINGOLD - Reset error g. Install FRM 12. Done/Summary 1:14:47 a. DPF b. Flex hose (* https://amzn.to/3A7Ii8z - Affiliate Link ) c. AGR d. FRM error fixed e. no more errors ▬▬▬▬▬▬ Attention ▬▬▬▬▬ If I could do the video again, I would go into some points in more detail and also improve the quality ;) Clean the DPF Check the oil and turbo lubrication. Change the oil if necessary Clean the injectors Clean the EGR/EGR cooler if necessary Check the intake manifold/clean it if necessary Clean the air filter Have a look through the comments, a lot of questions have already been answered. ▬▬▬▬▬▬ Special ▬▬▬▬▬ DPF is free again Proper disposal ▬▬▬▬ ENGLISH Version ▬▬▬▬▬ @Steven B. Tuner and the non damaging dpf cleaning! ▬▬▬▬▬▬ Music ▬▬▬▬▬ GEMA-free music https://www.terrasound.de ▬▬▬▬▬▬ Support ▬▬▬▬▬▬ Good luck and safe journeys! PS: Give me a thumbs up for the video and subscribe to my channel (thanks). You are also welcome to share the video.