Renault Scenic Engine Power Loss

Your symptoms do sound familiar. I had a similar issue with my old Opel Astra, though it was a diesel. Reduced power, engine light, rough running... turned out to be a faulty injector. Have you checked your spark plugs, air-fuel ratio, mass airflow sensor, throttle body or oxygen sensor?

Thanks for the quick reply! Regarding the injectors, how did you determine that was the problem? Did you notice any specific indicators besides what I mentioned?

Well, it was a process of elimination, to be honest. We checked all the usual suspects first – spark plugs, air filter, etc. Eventually, a diagnostic test pointed towards the injectors. It's worth getting it properly diagnosed at a workshop. In the end it's safer.

Thank you so much for sharing your experience! I took your advice and brought it to a workshop. Indeed, it was a defective injector, as you suspected. Repair cost me 515€. Again, I appreciate the help!