Audi A7 DPF Regen Failure, Smoke Signals Trouble

I faced a very similar exhaust system problem with my 2017 Audi A6 TDI last year. Having some experience with diesel engines, I initially tried running vehicle diagnostics myself using an OBD scanner, which confirmed the exhaust back pressure sensor malfunction. The symptoms matched yours exactly, warning lights, smoke issues, and DPF problems. The faulty sensor was preventing proper regeneration cycles, which explained the performance drop and smoke during acceleration. My repair shop confirmed the diagnosis and replaced the exhaust sensor. Total cost was 245 Euro, including parts and labor. The fix resolved all symptoms immediately, and the car has been running perfectly since then. Before suggesting specific solutions, could you share: Current mileage on your A7, How long the symptoms have been present, Whether you notice the issues more during cold starts, Any recent maintenance history related to the exhaust system This information would help determine if your car maintenance needs match what I experienced with my similar vehicle. Car maintenance involving exhaust system components often requires professional diagnosis, as back pressure issues can sometimes indicate other underlying problems that need attention.

I faced a very similar exhaust system problem with my 2017 Audi A6 TDI last year. Having some experience with diesel engines, I initially tried running vehicle diagnostics myself using an OBD scanner, which confirmed the exhaust back pressure sensor malfunction. The symptoms matched yours exactly, warning lights, smoke issues, and DPF problems. The faulty sensor was preventing proper regeneration cycles, which explained the performance drop and smoke during acceleration. My repair shop confirmed the diagnosis and replaced the exhaust sensor. Total cost was 245 Euro, including parts and labor. The fix resolved all symptoms immediately, and the car has been running perfectly since then. Before suggesting specific solutions, could you share: Current mileage on your A7, How long the symptoms have been present, Whether you notice the issues more during cold starts, Any recent maintenance history related to the exhaust system This information would help determine if your car maintenance needs match what I experienced with my similar vehicle. Car maintenance involving exhaust system components often requires professional diagnosis, as back pressure issues can sometimes indicate other underlying problems that need attention.

I faced a very similar exhaust system problem with my 2017 Audi A6 TDI last year. Having some experience with diesel engines, I initially tried running vehicle diagnostics myself using an OBD scanner, which confirmed the exhaust back pressure sensor malfunction. The symptoms matched yours exactly, warning lights, smoke issues, and DPF problems. The faulty sensor was preventing proper regeneration cycles, which explained the performance drop and smoke during acceleration. My repair shop confirmed the diagnosis and replaced the exhaust sensor. Total cost was 245 Euro, including parts and labor. The fix resolved all symptoms immediately, and the car has been running perfectly since then. Before suggesting specific solutions, could you share: Current mileage on your A7, How long the symptoms have been present, Whether you notice the issues more during cold starts, Any recent maintenance history related to the exhaust system This information would help determine if your car maintenance needs match what I experienced with my similar vehicle. Car maintenance involving exhaust system components often requires professional diagnosis, as back pressure issues can sometimes indicate other underlying problems that need attention.

Thanks for sharing those details. My A7 has 125297 KM on the odometer, with the last complete service done 2 months ago. The vehicle diagnostics point to similar sensor issues as you described. The engine performance problems started about 3 weeks ago, getting worse during cold starts. The emission control system seems particularly affected in the morning. Your repair cost of 245 Euro sounds reasonable if its just the exhaust sensor. Did your mechanic mention anything about checking the surrounding components while doing the repair? I am concerned there might be additional issues with the pressure sensor since my repair shop mentioned multiple fault codes during their initial scan. Makes sense to get this fixed soon before it causes more extensive exhaust system damage.

Thanks for sharing those details. My A7 has 125297 KM on the odometer, with the last complete service done 2 months ago. The vehicle diagnostics point to similar sensor issues as you described. The engine performance problems started about 3 weeks ago, getting worse during cold starts. The emission control system seems particularly affected in the morning. Your repair cost of 245 Euro sounds reasonable if its just the exhaust sensor. Did your mechanic mention anything about checking the surrounding components while doing the repair? I am concerned there might be additional issues with the pressure sensor since my repair shop mentioned multiple fault codes during their initial scan. Makes sense to get this fixed soon before it causes more extensive exhaust system damage.

Thanks for sharing those details. My A7 has 125297 KM on the odometer, with the last complete service done 2 months ago. The vehicle diagnostics point to similar sensor issues as you described. The engine performance problems started about 3 weeks ago, getting worse during cold starts. The emission control system seems particularly affected in the morning. Your repair cost of 245 Euro sounds reasonable if its just the exhaust sensor. Did your mechanic mention anything about checking the surrounding components while doing the repair? I am concerned there might be additional issues with the pressure sensor since my repair shop mentioned multiple fault codes during their initial scan. Makes sense to get this fixed soon before it causes more extensive exhaust system damage.

Thanks for those additional details. After seeing your numbers, I am even more convinced we dealt with identical issues. My A6 had around 130000 KM when the problem occurred. The exhaust pressure sensor replacement in my case also required a thorough inspection of connected components. My mechanic checked the complete exhaust system pathway and DPF condition while the sensor was being replaced. This is crucial since faulty vehicle emissions readings can mask other problems. Important note from my experience: the multiple fault codes you mentioned are typical with pressure sensor failures. In my case, they all cleared after the sensor replacement. The various codes appear because the back pressure readings affect multiple systems. Besides the sensor replacement, my mechanic performed a forced DPF regeneration after the repair to ensure the system was working correctly. This additional step cost 80 Euro but was worth it for peace of mind. Some maintenance tips post-repair: Regular highway drives help maintain proper DPF function, Monitor engine performance for a few weeks after repair, Keep track of regeneration cycles through your vehicle display The morning cold start issues should resolve completely once the new sensor is installed. The auto repair process is straightforward if there are no additional complications.

Thanks for those additional details. After seeing your numbers, I am even more convinced we dealt with identical issues. My A6 had around 130000 KM when the problem occurred. The exhaust pressure sensor replacement in my case also required a thorough inspection of connected components. My mechanic checked the complete exhaust system pathway and DPF condition while the sensor was being replaced. This is crucial since faulty vehicle emissions readings can mask other problems. Important note from my experience: the multiple fault codes you mentioned are typical with pressure sensor failures. In my case, they all cleared after the sensor replacement. The various codes appear because the back pressure readings affect multiple systems. Besides the sensor replacement, my mechanic performed a forced DPF regeneration after the repair to ensure the system was working correctly. This additional step cost 80 Euro but was worth it for peace of mind. Some maintenance tips post-repair: Regular highway drives help maintain proper DPF function, Monitor engine performance for a few weeks after repair, Keep track of regeneration cycles through your vehicle display The morning cold start issues should resolve completely once the new sensor is installed. The auto repair process is straightforward if there are no additional complications.

Thanks for those additional details. After seeing your numbers, I am even more convinced we dealt with identical issues. My A6 had around 130000 KM when the problem occurred. The exhaust pressure sensor replacement in my case also required a thorough inspection of connected components. My mechanic checked the complete exhaust system pathway and DPF condition while the sensor was being replaced. This is crucial since faulty vehicle emissions readings can mask other problems. Important note from my experience: the multiple fault codes you mentioned are typical with pressure sensor failures. In my case, they all cleared after the sensor replacement. The various codes appear because the back pressure readings affect multiple systems. Besides the sensor replacement, my mechanic performed a forced DPF regeneration after the repair to ensure the system was working correctly. This additional step cost 80 Euro but was worth it for peace of mind. Some maintenance tips post-repair: Regular highway drives help maintain proper DPF function, Monitor engine performance for a few weeks after repair, Keep track of regeneration cycles through your vehicle display The morning cold start issues should resolve completely once the new sensor is installed. The auto repair process is straightforward if there are no additional complications.

Thanks for the detailed explanation about your experience. Based on the similarities between our cases and the specific symptoms, I will proceed with the sensor replacement and DPF regeneration at my local repair shop. The emission control issues during cold starts match exactly what you described, and the total cost of around 325 Euro for both the pressure sensor replacement and forced regeneration seems reasonable for this type of exhaust system repair. Will definitely follow your post-repair maintenance tips, especially about the highway drives for proper DPF function. Vehicle diagnostics showed similar fault codes to your situation, so I am hopeful this will resolve all the issues. Planning to schedule the repair next week to prevent any further exhaust system complications. Really appreciate the thorough breakdown of your experience, it helped confirm my repair shop's initial diagnosis and gave me confidence in moving forward with the fix.

Thanks for the detailed explanation about your experience. Based on the similarities between our cases and the specific symptoms, I will proceed with the sensor replacement and DPF regeneration at my local repair shop. The emission control issues during cold starts match exactly what you described, and the total cost of around 325 Euro for both the pressure sensor replacement and forced regeneration seems reasonable for this type of exhaust system repair. Will definitely follow your post-repair maintenance tips, especially about the highway drives for proper DPF function. Vehicle diagnostics showed similar fault codes to your situation, so I am hopeful this will resolve all the issues. Planning to schedule the repair next week to prevent any further exhaust system complications. Really appreciate the thorough breakdown of your experience, it helped confirm my repair shop's initial diagnosis and gave me confidence in moving forward with the fix.

Thanks for the detailed explanation about your experience. Based on the similarities between our cases and the specific symptoms, I will proceed with the sensor replacement and DPF regeneration at my local repair shop. The emission control issues during cold starts match exactly what you described, and the total cost of around 325 Euro for both the pressure sensor replacement and forced regeneration seems reasonable for this type of exhaust system repair. Will definitely follow your post-repair maintenance tips, especially about the highway drives for proper DPF function. Vehicle diagnostics showed similar fault codes to your situation, so I am hopeful this will resolve all the issues. Planning to schedule the repair next week to prevent any further exhaust system complications. Really appreciate the thorough breakdown of your experience, it helped confirm my repair shop's initial diagnosis and gave me confidence in moving forward with the fix.