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[Alex97lewis]

I know the 2.0cdti can suffer from this and it's mostly due to the turbocharger wastegate actuator control failing.
On the 1.4 the part number should be 55574902

But you should really have the car tested and properly diagnosed before buying parts.

This link may also help you.
https://workshop-manuals.com/vauxhall/as...p0299_luj/

Thank you for your response - Definitely will look at having the car tested and diagnosed, just need to find somewhere local that won't charge stupid amounts for diagnosis.
I have noticed this morning mind that there's a bit of an oil leak from the intercooler pipe towards the throttle body, quite a bit of oil dripped from there onto the engine, wondering if this can be related to the fault I have