Hyundai i10 Exhaust Temperature Sensor Fault

I also own an i10, though I can't remember the exact build year right now. Your symptoms sound very familiar. When the check engine light initially came on, did you notice any unusual noises coming from underneath the car? Or any strange smells? I'm wondering if it could be a cracked exhaust manifold or a damaged catalytic converter, leading to temperature fluctuations.

Thanks for the quick reply. No unusual noises or smells that I've noticed. Just the light, the power loss, and the increased fuel consumption. The error code specifically points to the temperature sensor, so I assumed that was the culprit. Was your error code the same, or something different?

Yes, my error code also pointed to the exhaust temperature sensor. I replaced the sensor myself, but the problem persisted. Eventually, I took it to a workshop, and they found a small crack in the exhaust pipe near the catalytic converter. They welded it up, and that fixed the problem. It seems the faulty sensor reading was just a symptom of the exhaust leak.

Appreciate the insight. Sounds like I'll need to get the exhaust system thoroughly checked for leaks. I suspected the sensor reading might be a symptom rather than the root cause. I'll book it into a workshop. They quoted around 265€ for diagnostics and repair if it's a minor exhaust issue. Thanks again for sharing your experience!