ManuSchwarz

Mini Countryman Diesel Power Loss and Smoke

I am writing to you today concerning an issue I've encountered with my 2015 Mini Countryman diesel. I've noticed a significant reduction in engine power, accompanied by visible smoke during acceleration. A preliminary vehicle inspection suggests a defective diesel particulate filter as the most probable cause. Could a faulty DPF cause these symptoms? Could this also impact fuel efficiency? I am trying to avoid an expensive repair if it is something else, or just a sensor fault.

4 comment(s)

I had a similar experience with my Countryman. Reduced power and smoke usually point to DPF issues. Have you checked the backpressure sensor readings? What kind of driving do you typically do mostly short trips?

The backpressure sensor, you say? Where is that located, and what readings should I be looking for? I do mostly city driving, with shorter trips, which I understand isn't ideal for regeneration.

The backpressure sensor is usually mounted on or near the DPF. As for readings, you'd need a diagnostic tool to see live data high backpressure confirms a blockage. Given your driving style, the DPF likely isn't regenerating properly. It might be worth getting a professional diagnosis before replacing it though.

Thank you for the insights. I took it to a workshop, and after diagnosis, the diesel particulate filter was indeed defective. Replacement cost me 1550€. Hopefully, this resolves the issue for good.

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