Jaguar DPF Failures & Black Smoke: Sensor Issues Alert

I had a very similar issue with my 2017 Jaguar XF diesel about 8 months ago. Having some experience with vehicle diagnostics and exhaust systems, I initially thought it might be just a DPF issue. The symptoms matched yours exactly, persistent DPF light, failed regeneration attempts, and black smoke. My regular workshop performed a thorough diagnostic scan which confirmed the exhaust back pressure sensor was failing to provide accurate readings. They explained this was causing the engine management system to miscalculate the regeneration needs. The repair involved replacing the back pressure sensor and performing a system reset. Total cost was 245€ for parts and labor. After the fix, all symptoms disappeared and car maintenance has been smooth since then. Before suggesting specific solutions for your case, could you share: Current mileage on your XE? When was the last DPF cleaning or regeneration successful? Have you noticed any changes in fuel consumption? Any other warning lights appearing alongside the DPF warning? This information would help determine if your issue is isolated to the sensor or if other exhaust system components need attention.

Last service done at 117494 KM. In my case, the problem was actually more complex than initially thought. The vehicle diagnostics revealed that while the back pressure sensor was indeed faulty, it was a symptom rather than the cause. The main issue turned out to be carbon buildup severely restricting exhaust flow. The exhaust system required a complete professional cleaning, and the pressure sensor needed replacement since it had been damaged by excessive soot. Fuel consumption has definitely increased by about 15% and the engine management light now flickers occasionally. The particulate filter warning comes on more frequently during city driving. Would be grateful for insights on whether others faced similar multiple-component failures in the exhaust system.

Based on your symptoms and findings, your situation sounds very familiar. My 2017 XF faced the same progression of issues. After my initial sensor replacement, I also noticed the problem went deeper than first diagnosed. The complete carbon buildup removal from the exhaust system ended up being essential for restoring proper function. The auto repair shop found significant soot accumulation that was causing restriction in multiple areas. The original sensor replacement alone wasnt enough because the underlying flow issues damaged the new sensor within weeks. My repair ultimately included: Professional carbon cleaning of entire exhaust system, New back pressure sensor, EGR valve cleaning, DPF pressure differential sensor replacement, Full emission control system calibration Total cost reached 890€ but solved all issues. Fuel consumption returned to normal and warning lights cleared completely. For ongoing car maintenance, I now ensure longer highway drives at least weekly to promote proper DPF regeneration. This helps prevent future carbon buildup issues in the exhaust system. Would recommend having your EGR system checked as well, as these components often suffer when exhaust flow is restricted for extended periods.

Thanks for the detailed insights. I took my XE back to the workshop today and shared the experiences you mentioned. They confirmed similar findings after running extensive vehicle diagnostics, multiple components in the emission control system were affected by the carbon buildup. After a thorough inspection, they found the EGR valve was indeed heavily clogged, just as you suggested. The auto repair team is now proposing a complete system overhaul including: Full exhaust system cleaning, EGR valve replacement, Both pressure sensors replacement, System recalibration Quote came in at 950€ which seems reasonable given the scope. Good to know this comprehensive approach worked for your XF. Hoping this resolves my fuel consumption issues and those persistent warning lights. Going forward, I'll definitely implement that highway driving tip to maintain proper DPF function. Learning the hard way that city driving alone really impacts these diesel exhaust systems.