Fiat Novo exhaust back pressure sensor issue

I encountered a comparable issue with my Opel Astra a few years ago. The symptoms manifested in a similar fashion – warning light and visible smoke. Considering your Fiat Novo's mileage and the symptoms described, a defective exhaust back pressure sensor appears to be a strong possibility. Have you observed any changes in engine performance beyond the warning light and smoke, such as rough idling or decreased fuel efficiency?

Thanks for the info! Besides the light and smoke, the engine seems a bit sluggish, especially when starting. Fuel consumption seems normal, though. Was the exhaust back pressure sensor the only thing causing the issue on your Opel?

Indeed, the defective exhaust back pressure sensor was the sole cause in my case. Given the symptoms you've described for your Fiat Novo—specifically the warning light, smoke upon acceleration, and diminished engine responsiveness during startups—I strongly advise consulting a qualified mechanic for comprehensive vehicle diagnostics. It is probable that the sensor is indeed faulty and requires replacement.

I appreciate the advice! I'll take it to the workshop to get it checked out. Sounds like it's probably the sensor. I'll post an update once it's sorted! It was the sensor! Cost me 245€ including labor. Thanks again!