Def not moving, no pulling power

If you are not sure about what a code is or means you can always call the Volvo help line. They will tell you what it is and usually can offer some technical assistance. The phone number is in the owners manual. Or download the volvo app.

Also if you have had to replace the NOX sensors you might be needing to replace some of the other parts of the DEF/DPF system soon. They might last about 4 to 5 years and then need replacement. This depends on what has been done to the truck and how it was driven before your purchase of it. The lower the idle time the better off you are, it seems to be the key to reducing the cost of maintaining the DEF/DPF system.. You might want to look at the Doser Module, Delta P Sensor etc. and the EGR cooler, maybe have it cleaned as it can plug up and cause problems. It just depends. There are always surprises.

Good Luck

 

Im Assuming everything is good after this