SPN 520342 FMI 17 - Cascadia

Hello everyone - Truck is showing 3 codes but I am worried about SPN520342. I looked up online and it has to do something with DEF PUMP SPEED. Any chance Def Pump has gone bad?

Also, I had the DEF pump replaced at a truck repair shop in New Mexico in 14 April 2024. However, it began having issues again in November 2024. The repair shop from New Mexico emailed the original invoice to the Freightliner dealership, which then gave me the new Def Pump. Now if it is the Def Pump again, do you think the dealership will replace it again or NOT since the replacement which was given to me in November 2024 is giving me issues again.

 

Honestly, I do NOT remember because it’s been about 6 months and it ran completely fine all these 6 months. I am just hoping it’s some kind of leak.

 

This also happened a few months back, Not sure where this is located but it was leaking DEF
Watch Def Leak | Streamable

 

UPDATE - There is DEF Leakage underneath. Video here > Watch WhatsApp Video 2025-04-20 at 12.27.03 PM | Streamable