Hey guys, need some advice please? A while ago I encountered my 2006 S40 D Se 2.0 having a limp mode problem. Fault code reader shows P2452, P2453 and P2455.

The car has just under 180K on it, and owning it less than a year I have no idea if the DPF has ever been replaced.
Previous owner says he had the Eolys fluid done before I bought it. Now, I have read the sensors can sometimes go wrong on these and this is the cheapest place to start as I dont have access to DICE software that Volvo use.

Is it best to test the sensor if possible? If it IS the sensor, does anyone know of a stockist of the part 3M5A5L200-AB that doesnt cost millions of pounds?
GSF car parts do the DPF itself but again this isnt cheap either, so I am open to suggestions?

Cheers,

Scotty