Paccar MX Aftertreatment Fault Codes

P3770 on a PACCAR MX engine should be treated as an aftertreatment system performance, inducement, or DPF/SCR monitoring fault.

P3773 on a PACCAR MX engine should be treated as an aftertreatment system performance, regeneration, or emissions monitoring fault.

P3796 on a PACCAR MX engine should be treated as an aftertreatment dosing, regeneration, or emissions-control performance fault.

P3797 on a PACCAR MX engine should be treated as an aftertreatment system performance or SCR/DPF monitoring fault.

P3798 on a PACCAR MX engine should be treated as an aftertreatment fault status, inducement, or monitored emissions performance fault.

P3844 on a PACCAR MX engine should be treated as an aftertreatment system performance, regeneration, or inducement logic fault.

SPN 3251 FMI 0 is an aftertreatment DPF pressure-related fault on the PACCAR MX platform.

SPN 3251 FMI 15 is an aftertreatment DPF pressure-related fault on the PACCAR MX platform.

SPN 3251 FMI 16 is an aftertreatment DPF pressure-related fault on the PACCAR MX platform.

SPN 3251 FMI 6 is an aftertreatment DPF pressure-related fault on the PACCAR MX platform.

SPN4794 is an aftertreatment-related SPN that should be investigated with the complete PACCAR MX diagnostic context.

SPN 5246 FMI 0 is generally an aftertreatment inducement or emissions-system status fault.

U1700 is a network or communication-type fault involving an aftertreatment-related module, sensor, or controller on the PACCAR MX platform.

U185A is a network or communication-type fault involving an aftertreatment-related module, sensor, or controller on the PACCAR MX platform.

U185B is a network or communication-type fault involving an aftertreatment-related module, sensor, or controller on the PACCAR MX platform.