Vanette Cylinder Pressure Fluctuation

I had similar issues with my old Peugeot. Cylinder pressure problems can be tricky. Have you checked the turbocharger or head gasket? Could also be timing belt related. Any engine knocking?

I haven't checked those specifically. Engine knocking can sometimes be heard. Could a crankshaft issue be involved too?

Could be, but crankshaft issues are less common. Given the engine knocking and other symptoms, and that I had a similar issue, it might be a consequential error resulting from another error. Best to get it checked at a workshop to pinpoint the root cause.

Thank you for the advice. I took it to a workshop and they found a faulty sensor that was causing all of the issues. The repair cost was 0€ because it was covered by warranty.