Gienia exhaust smoke warning light

I had a similar issue with my Honda Gienia, but mine was related to emission control. The symptoms you describe sound familiar. Have you checked the sensor itself for any visible damage or loose connections? Also, have you scanned the car's computer for error codes? That might give you a clearer picture of what's going on.

Thanks for the quick reply! I did a quick visual inspection, but nothing obvious jumped out. I also scanned for error codes, which is how I arrived to the diagnosis of a defective exhaust back pressure sensor. I'm wondering if it's worth trying to replace the sensor myself, or if it's best to take it to a workshop for diagnostics?

Given that you have already identified the error code pointing to the exhaust back pressure sensor, and assuming you have the appropriate tools and knowledge, a replacement could be attempted. However, considering the potential impact on engine performance and emission control, it would be prudent to seek professional diagnostics. A workshop will ensure the replacement is correctly performed and the system is properly calibrated. Incorrect readings from a faulty calibrated sensor could trigger related failures.

Thanks for the advice, I appreciate it! I took it to the workshop, and it was indeed the exhaust back pressure sensor. The total repair cost came to 245€. All good now!