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Mini Roadster Diesel engine running roughly

I hope someone can offer some insight into a persistent issue I am experiencing with my 2015 Mini Roadster Diesel. The engine is running roughly, and the check engine light has illuminated. The onboard diagnostics reported an error related to 'reset quantity drift compensation'. From what I've gathered, a defective injection valve or injector seems like a likely cause. Has anyone encountered this previously? I would be grateful for any guidance before potentially facing a 515€ repair bill. Could this be linked to other car sensors malfunctioning?

A 2015 Mini Roadster Diesel is experiencing rough engine running and an illuminated check engine light, with an onboard diagnostics error related to 'reset quantity drift compensation.' A defective injection valve or injector is suspected as the likely cause. The issue aligns with symptoms such as increased fuel consumption and a smell of unburnt diesel. A workshop visit confirmed a faulty injector, and its replacement, along with recalibration of the fuel injection system, resolved the problem.

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4 comment(s)

Rough engine running and a check engine light on your Roadster, with that error code, sounds familiar. I had a similar issue with my Mini. Did you notice any changes in fuel consumption or any unusual smells? It could be related to faulty car sensors or issues with fuel injection.

Thanks for the quick reply! Fuel consumption did seem a bit higher than usual, and there was a faint smell of unburnt diesel, so that aligns with fuel injection issues. Do you recall if you had any other error codes or specific symptoms besides the ones you already mentioned? Did you attempt any performance tuning before this issue arose?

Yes, the unburnt fuel smell is a key indicator. I did experience other errors related to misfires. I didn't attempt any performance tuning, so I wouldn't know if that caused the issue. My advice is to go to a workshop with a good diagnostic tool. They'll perform more thorough onboard diagnostics on the fuel injection system and confirm the faulty injector.

I appreciate you confirming my suspicions. After a visit to the workshop, the diagnostics indicated a faulty injector. The 'reset quantity drift compensation' error was indeed a symptom. Replacement of the injector and recalibration of the fuel injection system, as part of onboard diagnostics, seems to have resolved the rough running and check engine light issue. Thanks for your input!

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MINI

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ROADSTER