Mini Roadster Stalling at Idle

I had something similar happen with my Mini. Check engine light kept popping on, and it would occasionally stall at idle, mostly when cold. The problem ended up being related to the EVAP system. The EVAP system, or evaporative emission control system, prevents fuel vapor from escaping into the atmosphere. It uses things like the purge valve and the activated charcoal filter. Have you checked the purge valve and all the hoses for leaks? Sometimes a loose gas cap can even trigger it.

Purge valve, okay. Where exactly is that located, and how would I check it for leaks? And you mentioned the charcoal filter as well, is there a way to test the air flow through that? I'm assuming a system failure would cause the check engine light.

Yeah, a system failure will definitely trigger the check engine light. Honestly, pinpointing the exact leak in the EVAP system can be tricky without the right tools, especially if it is the charcoal canister. My issue was actually a cracked hose. If you're not comfortable diving deep, a mechanic with a smoke tester can find it pretty quickly. Otherwise, it’s a process of checking air flow and looking for cracks. It might be worth getting a quote from a shop before you spend a ton of time on it. Good luck!

Just wanted to let you know, I took the Roadster to the shop. Turns out it was a defective activated charcoal filter, just like we suspected. New filter and labor came out to 275€. Runs like a charm now, no more check engine light or stalling. Thanks for your help!