eberhardroth1

Mini Cabrio engine power loss

Alright, so the check engine light is on in my 2014 Mini Cabrio. I'm getting seriously reduced engine power and the engine response is terrible, and the fuel consumption is way higher than normal. I suspect it could be a boost pressure control fault, maybe a defective vacuum switching valve. Any thoughts?

4 comment(s)

That sounds familiar. I had similar symptoms with my Mini Cabrio. Check engine light, loss of power, and the fuel consumption went up. I would suggest checking for a vacuum leak. Has the pressure sensor ever been replaced?

Vacuum leak, you say? Where exactly should I be looking? Did you experience any turbo lag, or issues with the bypass valve when you had the problem?

Yes, I did have turbo lag. The workshop identified it as a defect in a vacuum switching valve. It controls the boost pressure. I suggest you get the boost controller checked out and take it to a workshop. It's hard to diagnose these kinds of issues without the proper tools.

Just wanted to close the loop on this. You were spot on. Took it to a workshop, and they confirmed the vacuum switching valve was faulty. Repair cost me 140€. Runs like new now. Thanks for the help.

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