Honda Brio Exhaust Back Pressure Sensor Issue

I have a Brio, too. Those symptoms definitely sound like a back pressure problem. The exhaust back pressure sensor, or EPB sensor, measures the pressure in your exhaust system. If it fails, the car's computer receives incorrect data, leading to poor engine performance and potentially causing it to emit smoke. What's the mileage?

The car has 189729 km on it. Is it possible to fix the sensor myself, or should I take it to a professional?

With that mileage, it's not surprising. You could try replacing the sensor yourself if you have the tools and know-how. The sensor is usually located somewhere on the exhaust manifold or near the catalytic converter. However, if you're not comfortable working on the exhaust system, I'd recommend taking it to a reputable workshop. They'll be able to diagnose the issue accurately and replace the sensor if needed. Also, sometimes a faulty sensor can damage other parts. It's always better to be safe.

Thank you for your advice. I took it to a workshop, and it was indeed the exhaust back pressure sensor. The repair cost 245€. The issue is now resolved.