Technical No compression on the third cylinder after particle filter cleaning

[MQ2007]

Hello there, I'm thinking on buying a fiat punto van, 1.3 diesel, 75hp from 2011, it only has 170thousand kilometers on it, the car is in a really goo price, but the seller says that the third cylinder lost compression after a particle filter cleaning at a local shop, does anyone here have any idea what the problem could be?
I'm really tempted on buying it, mostly because the car is still in pretty good shape for the age, and it has really low milage.

i hope you guys can help me

 

[jackwhoo]

If no compression on any one of cylinders the engine will require major work or a replacement good engine.
Most likely a good used engine.
The story you have been told does not sound like the whole story.
Do not buy it unless you happy to spend a lot of money on it having new engine and maybe dpf too