48 Paccar PX Fault Codes
Paccar PX ECM Fault Codes
Paccar PX-series diesel ECM fault codes — shares Cummins fault code definitions across aftertreatment, EGR, turbo, derate, fuel, and VGT systems.
Aftertreatment22 codes
Paccar PX Aftertreatment
DPF, DEF, SCR, and NOx-reduction system faults.
EGR6 codes
Paccar PX EGR
Exhaust gas recirculation valve, cooler, and flow faults.
Turbo4 codes
Paccar PX Turbo
Turbocharger boost control and air-handling faults.
Derate3 codes
Paccar PX Derate
Engine protection and emissions inducement power-limiting faults.
Fuel8 codes
Paccar PX Fuel
Fuel delivery, injector, and rail pressure faults.
VGT5 codes
Paccar PX VGT
Variable geometry turbocharger actuator and calibration faults.
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