Grandland X Cylinder Pressure Fluctuation

That sounds unsettling. I had similar symptoms with my old Renault Megane, although it was a petrol engine. The symptoms were almost identical: engine light, poor fuel economy, and a definite loss of power. Have you checked for any error codes? In my case, it turned out to be a dodgy sensor causing consequential errors.

Thanks for the quick reply! What kind of sensor was faulty on your Megane? Did it directly relate to the engine cylinders?

From what I remember, it was the mass airflow sensor that was faulty on my Renault Megane. While it didn't directly relate to the engine cylinders, the incorrect readings caused the engine to misfire, leading to cylinder pressure issues and all those lovely symptoms. Given that it's a fairly complex system, I'd strongly advise getting it checked out at a trusted workshop rather than trying to fix it yourself without the proper diagnostic tools. It could save you a lot of time and money in the long run!

Took it to the shop, and you were right! It was a consequential error! It turns out that a faulty sensor was causing the cylinder pressure fluctuation. Repair cost was 0€ because of the warranty. Thanks for the advice!