Auris check engine light and power loss

I had a similar issue with my Opel Corsa, though it was petrol. Any temperature fluctuation at idle? It might be the sensor, but it is a diesel, so maybe check the air intake system for leaks or blockages. The cable or plug connection might be defective.

Thanks! You mentioned checking the air intake. Could a leak there really cause all these symptoms, especially the error code related to the charge sensor?

Yes, a leak in the air intake can cause those symptoms, as the charge sensor measures the air temperature and mass. Since you have an error code, it is very likely that the sensor is faulty. I would recommend taking it to a workshop.

Thanks a lot! Took it to the shop, and you were right. It was a defective cable and plug connection to the charge air temperature sensor. Cost me 95€, but it's fixed!