Q5 TDI Clogged DPF Causes Power Loss and Smoke Issues

My 2013 A6 3.0 TDI had similar symptoms. The exhaust back pressure sensor was defective, causing false DPF pressure readings. This triggered reduced power mode and prevented proper DPF regeneration cycles. Main symptoms matched yours: Multiple warning lights, Power loss during acceleration, Dark exhaust smoke, Strong diesel smell The low pressure readings from the faulty sensor confused the engine management system, making it think the DPF was blocked when it wasnt. This is a serious issue that needs proper diagnosis and repair, as it can lead to complete DPF failure if left unchecked. The repair required: Full diagnostic scan, Pressure sensor replacement, Forced DPF regeneration, System reset A blocked DPF can cause engine damage if not addressed. The sensor itself is accessible, but replacing it requires specific diagnostic equipment to reset the system properly. Regular highway driving after repair helps maintain proper DPF function. Best to have this checked at a shop with diesel engine expertise. The repair is moderately complex but crucial for preventing more expensive damage.

Had exactly the same problems with my Q5 diesel engine last winter. The emission control system was acting up, showing identical symptoms with the particulate filter pressure warnings and reduced power mode. Got it fixed and the car runs perfectly now. Just wondering, how much did the repair end up costing you? In my case, replacing the pressure sensor and doing a forced regeneration solved the issue completely. Have you had any problems since getting it fixed? Would be good to know if anything else popped up later.

After getting the exhaust back pressure sensor replaced and having a proper DPF regeneration cycle done, my A6 has been running flawlessly. The total repair cost came to 245 Euro, which included the diagnostic work and system reset. The low pressure warnings completely disappeared after fixing the sensor. The diesel engine is performing much better now with normal power delivery. No more issues with reduced power mode or warning lights on the dash. The exhaust system is working as intended, maintaining proper DPF pressure during operation. Most importantly, the fix has been lasting, no recurring problems in the months since the repair. The DPF regeneration cycles are happening normally now that the pressure readings are accurate. Regular motorway driving keeps everything working smoothly. Compared to the potential cost of a complete DPF replacement, catching and fixing the faulty sensor early was definitely the right call. The repair price was reasonable considering the specialized diagnostic equipment needed for proper sensor calibration.

Thanks for the input. Finally got my Q5 sorted last week after dealing with those annoying DPF issues. Took it to a specialist diesel engine shop and the diagnosis matched what others experienced, faulty pressure sensor in the exhaust system. Total bill came to 280 Euro for sensor replacement, regeneration, and system reset. More reasonable than the previous shop that wanted to charge double just for checking. The particulate filter itself was actually fine once they got the correct pressure readings. Car runs like new now. No more warning lights, full power restored, and the diesel exhaust smell is gone. Did a long motorway run after the repair to help complete a proper regeneration cycle. Really glad I checked here first instead of rushing into an expensive DPF replacement. Best decision was finding a shop that actually knows diesel engines and DPF systems. They showed me the diagnostic readings before and after, huge difference in the exhaust pressure values. Money well spent to fix it right the first time.