What problems have you had with your Mondeo?

[Sam123]

Hi I have 2010 diesel turbo mondeo. There's 2 issues, first is when I accelerate the car hesitates for abit then it accelerates. Other times, rev will be high but doesn't feel much acceleration.

Second issue is, there's a small round shaped sensor on right side of the engine looking from the front of the car (oil drip found on this sensor). I tried to take photo but air cleaner hoses are blocking the view. This sensor has 2 allan key bolts and sits right below the black component (vaccuum pump?)

I hope someone had similar issue with their mondeo and could help me how to resolve this issue