V50 Oxygen Sensor Heater Failure

I had something similar on my V50. Check engine light and all. Was it the sensor before or after the cat?

Good question. The error message isn't that specific. How did you figure out which one was the issue?

Mine was the one before the cat. Honestly, I just took it to a workshop. They diagnosed it pretty quick.

Appreciate the insight. Sounds like I'll get it professionally diagnosed. The estimated repair cost is around 95€, including the sensor. Beats chasing ghosts blindly. Thanks!