svenfox1

Mini Countryman diesel fault

I'm pulling my hair out here! My 2023 Mini Countryman diesel has developed a worrying fault. The speedometer warning light is on, and it's belching smoke when I accelerate. I suspect it's the exhaust back pressure sensor, as the DPF won't regenerate. Could a defective pressure sensor be the culprit behind these emission control symptoms and vehicle emissions issues?

4 comment(s)

I had a similar issue with my Countryman. Warning light, sluggish acceleration. Does it also struggle during DPF regeneration? It sounds like a faulty pressure sensor, as you suspect. Is the smoke black or more of a greyish colour?

Good to know I'm not alone! The smoke is definitely black, and yes, the DPF regeneration won't complete. Was it a straightforward fix for you, or did the workshop encounter any complications?

Black smoke points to unburnt fuel, which makes sense if the DPF isn't regenerating due to a faulty exhaust system pressure sensor. For me, replacing the sensor was the solution. I would suggest taking it to a workshop for diagnosis; they should be able to confirm it quickly.

Just got the Countryman back. It was indeed the exhaust back pressure sensor. Total cost was 245€. Thanks for confirming my suspicions, it saved me a lot of needless worrying!

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