Corolla exhaust back pressure sensor issue

Sounds familiar. I had a similar issue with my old Opel Astra. Same symptoms: warning light and smoke. In my case, it was also the exhaust back pressure sensor. I would check the sensor first.

Thanks for the quick reply! Was it difficult to diagnose the sensor issue? Did you replace it yourself or did you need to take it to a shop?

I had it diagnosed at a shop. I wouldn't recommend doing it yourself unless you have experience. The sensor might be difficult to reach and you need specific tools to check the readings. I recommend you go to a workshop for checking. It cost me around 250€ for a new sensor and the repair.

Okay, thanks for the advice! I'll take it to a mechanic to have it checked. Seems like the sensor is the likely culprit. The repair set me back 245€, sensor was indeed defective.