Navistar MaxxForce 9

DIAGNOSTICMANUAL
AFTERTREATMENTSYSTEMFAULTCODES
13.1.MAXXFORCE
®
11,13AND15
SPN
FMI
ConditionPossibleCauses
32510
DPFDPexcessivelyHIGH(Plugged
lter)
•RestrictedDieselParticulateFilter(DPF)
•LowFuelDeliveryPressure
•RestrictedAftertreatmentFuelInjector
(AFI)unit
•ParkedRegenInhibited
•Exhaustleak(s)
•BiasedDieselParticulateFilter
DifferentialPressure(DPFDP)sensor
•BiasedIMPsensor
•Lowboostpressure
325114DPFDPsensorpressurehoses
reversed
•DPFDPsensorpressurehosesreversed
•DPFDPsensorhose(beforelter)
restricted
325121
DPFDPexcessivelyLOW
(Sensor/circuitfaultormissing
DPF)
•BiasedDPFDPsensororcircuit
•CrackedDPF
•DPFDPsensorpressurehosesreversed
•DPFDPsensorhose(beforelter)leaking
ordisconnected
34711
FuelPressure1belowdesired(Low
systempressure)
•AftertreatmentFuelDoser(AFTFD)
failure.Blocked,stuckopen,orclosed
•LeakinAFTFDfuelsupplyline
•FailedAftertreatmentFuelPressure1
(AFTFP1)sensor
•AftertreatmentFuelShutoffValve
(AFTFSV)stuckclosed,orblocked
3471
7
FuelDoserValvenotrespondingas
expected
•AFTFDfailure.Blocked,stuckopen,or
closed.
•StuckAFIorAFTFSV
•BiasedAFTFuelPressure2signal
34800AFTFP1toohighwhiledosing
•FuelDeliveryPressure(FDP)above
maximum
•Restrictedfuelreturnlinebetweenlter
housingandfueltank
147
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