Sounds similar to what I experienced with my Mini too, though mine is a Cooper. I had some rough gear shifting and the engine light came on. Did you check the gearbox oil level? That could be the gearbox sensor acting up because of low oil.

How did you check the gearbox oil level? Is it something I can do myself, or will I need to take my One to a shop?

I didn't check it myself because it can be a bit messy. However, based on your error codes and symptoms, it's very likely the gearbox sensor. If it’s the temperature sensor due to low oil, you might get away with just topping it up. If the sensor is faulty, it needs replacing. Best get it to a workshop to be sure with the automatic transmission.

Just wanted to update you: the garage confirmed it was the transmission oil temperature sensor. They also found the oil level was low, like you suggested. All fixed for 365€! Thanks for the help!

Fuj, moje Mini One z roku 2012 mi dělá starosti! Svítila kontrolka motoru a řazení je hrozně drsné s vrzajícími zvuky. Načetl jsem chybovou paměť a ukazuje na vadný snímač teploty oleje v převodovce. Navíc se občas zdá, že je převodovka v nouzovém režimu. Může to být tím snímačem teploty, nebo je to něco jiného?

Problémy s řazením převodových stupňů Mini One