There is a scraping noise coming from the engine when accelerating.

Sounds like a possible resonation of something touching something else. One example would be like a heat shield. A catalytic converter heat shield, for example, could be loose and buzzing at certain engine speeds and vibrations. In any case, a good physical inspection is in order to see what is making the noise. My guess is that it's incidental and not any kind of safety concern.

Hey. I have a similar issue with my HRV. Did you get to know what exactly was the problem? And what did you do. It will be extremely helpful.