Navistar MaxxForce 9

DIAGNOSTICMANUAL
37200DPFAshloadatmaximumlimit•HighDPFashlevel
•LowFuelDeliveryPressure
•RestrictedAFIunit
•ParkedRegenInhibited
•Exhaustleak(s)
•BiasedDPFDPsensor
•BiasedIMPsensor
•Lowboostpressure
40770AFTFP2toohighwhiledosing•AFTFDstuckclosed
•AFIplugged
40771AFTFP2toolowwhiledosing•FuelleakbetweenAFTFDandAFI
•AFTFSVstuckclosed
476610
DPFRegenerationfeedbackfault•DieselOxidationCatalystOutlet
Temperature(DOCOT)notheatingup
duringexhaustinjection
•DieselOxidationCatalyst(DOC)failure
(faceplugged)
476620
DOCOutletTemperatureabove
maximumdesired
•AftertreatmentFuelInjector(AFI)plugged
orsticking
•Engineover-fueling
•DSIleakingintoexhaust
•AFTFDstuckopen
•Fuelleak(s)toexhaust
•DOCOTsensororcircuitfailure
476621
DOCOutletT emperaturebelow
minimumdesired
•DOCfailure
•DSIfault,notinjectingwhencommanded
•DSIsystemfuelleak
•DOCOTsensororcircuitfailure
52982
ReducedDOCEfciency—De-Rate•BiasedDOCOTsensororcircuit
•PluggedAFIorAFIhousing
•DSIfailure
•DSIsystemleak
•DOCfailure
•Restrictedairlter
•Exhaustleaks
149
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