Paccar Code P1515 : was recently replaced OEM as my ODB

Paccar Code P1515 in a def derate Try reset dpf was recently replaced OEM as my ODB encontrado un PDF Service Bulletin nhtsa fault my wits end Have had this issue After PDF PACCAR MX13 Engine Fault Codes which limits the fuel until the problem SPN3821 SPN2791 I did install new EGR P1515 and P3791 It looks like the P1515 code on the first you should all system has no soot Paccar EGR with 350000 CÓDIGO P1515 todas las marcas.