SPN 520342 FMI 31 - Def Pump High Speed

Hello everyone - Truck is showing 3 codes but I am worried about SPN520342 FMI 17. I looked up online and it has to do something with DEF PUMP SPEED. Is the Def Pump gone bad or could some leakage?

It was snowing last night and during snow I get SPN 523010 FMI 31 code all the time (SPN 523010 FMI 31 indicates a diagnostic link failure on the CAN-BUS). Any co-relation between these codes?

Rest of the 2 codes are gone and only SPN 520342 is active now.

 

UPDATE - There is DEF Leakage. See video below!!

Watch WhatsApp Video 2025-04-20 at 12.27.03 PM | Streamable

 

AC was NOT on but the DEF pump is full of crystalization. Getting it replaced now!!

 

They are in the middle of replacing the pump now but once the truck is back in Bakersfield, will have my mechanic take a look at it,