Hello and Welcome-
My name is ***** ***** Im happy to help...
Swan Vesta's - that takes me back !! Well - lets see if we can avoid that for you eh..
Ive digested all that you have wrote -
Now the codes that you have -they both refer to the same circuit...
All the codes in between refer to different parts of the same circuit -so you can see where your trouble lies - at least, going off the codes you have..
So its Exhaust gas pressure sensor circuit - this then is either - ( as above)... Wiring - blockage in pipe / leak / perished pipe / loose etc - or faulty component ( gas sensor )
It adds up - with the issues with the Dpf to be honest - so thats what needs checking out now.. and you should then have this sorted.
Thats all I have on this - I sincerely ***** ***** all helps you -Im sure it will -
Im very pleased to have helped you - Do let me know if you need anything more --*** >>>> Please do click on the "OK/ Excellent ratings" for me - Thank you in advance for that...You can and are most welcome to get back to me anytime you might need - clicking the OK ratings does not close you out at all..Kind Rgds, MIKE.