Paccar MX Derate Fault Codes

P1106 is listed as a PACCAR MX derate-related fault.

P1108 is listed as a PACCAR MX derate-related fault.

P1109 is listed as a PACCAR MX derate-related fault.

P110D is listed as a PACCAR MX derate-related fault.

P1514 is listed as a PACCAR MX derate-related fault.

P1517 is listed as a PACCAR MX derate-related fault.

P1518 is listed as a PACCAR MX derate-related fault.

P3770 appears in the derate list because PACCAR MX aftertreatment faults can trigger torque reduction or vehicle speed limitation when the emissions system does not meet required conditions.

P3844 appears in the derate list because PACCAR MX aftertreatment faults can trigger torque reduction or vehicle speed limitation when the emissions system does not meet required conditions.

SPN 3251 in the derate category usually points to DPF pressure or restriction contributing to engine protection or emissions inducement.

SPN 4374 is commonly associated with the DEF/SCR dosing system or aftertreatment fluid control.

SPN 5246 FMI 15 is typically an emissions inducement or derate-stage fault.

SPN 5246 FMI 16 is typically an emissions inducement or derate-stage fault.

SPN 5246 FMI 19 is typically an emissions inducement or derate-stage fault.

SPN 7107 is an incomplete SPN-only entry in the derate category because no FMI was provided.