another d13 with dpf issues

The first code is a cooler efficiency issue. The cooler could be plugged, EGR valve sticky, sensor biased according to Volvo troubleshooting. What they don't suggest is over fueling and higher than expected exhaust gas entering the cooler.

 

No Surprise on this. How many miles do you have on the motor now?

 

Long cranks:
When it happens again, go on the driver's side of the engine and look for a primer pump.
Inside the frame, kinda hard to find. Unscrew the top knob,
rotating counter clockwise and start pumping fuel.
Count how many times you pump until you feel an increased pressure.
That's when you switched from pumping air to pumping fuel.
Continue pumping for another 20-30 times.
Try another start.
If it starts, great. If not, keep pumping.
If this action corrects the issue, you should check
and replace a check valve placed on the fuel line.
It's role is to prevent fuel to return to the fuel tanks.
It's an inexpensive part, easy to replace.
Codes:
Are those codes you mentioned active or inactive.
Can they be cleared with a tech tool?
I'm asking this because it seems this unit has more than one issue.
Probably 2 or 3 concomitant problems that needs to properly identified.
What is the soot level reported in the dash when you climb uphill heavy?
Look at it next time you start a hill and see where it's going.
I'll stop right here for now and let other posters to chime in.
It would be helpful to check again and report back to the Forum with your findings.
Good luck.

 

Find the reason for the long cranks and fix it ASAP.
Otherwise you risk burning your starter.

 

I feel your pain. I felt it too, for many years.
The competence level in the Volvo sphere
is erratic bordering Incompetence.
Your unit is out of warranty. Any local shop specialized
in Volvo trucks will and can do a better job
and provide a better customer service than any Volvo dealership.
Throwing injectors at an engine without a proper diagnostic it's sheer lunacy.
It may or may not be necessary but needs to be tested
and everything else eliminated before spending 6k or more.
If I were you I would start the search for another service provider while your unit is down, right now.
I would visit the shop and spend couple hours watching
them working while discussing your specific
issues with the shop owner or the shop foreman.
Ask them for a free second opinion when your unit is out of the Volvo tight grip.
Come back here and share your observations with this community.
OK?