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DIAGNOSTIC MANUAL
3480
1
3481
7
3556
0
3556
1
3556
7
3719
0
3719
15
3719
16
148
AFTFP1 too low while dosing
Incorrect dosing pressure, multiple
events
AFT fuel pressure 2 excessively high
(Restricted injection)
AFT fuel pressure 2 below desired
AFT Fuel Injector not responding as
expected
DPF Soot Load - Highest (level 3/3)
DPF Soot Load - Lowest (level 1/3)
DPF Soot Load - Moderate (level
2/3)
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•
FDP below minimum
•
Dirty fuel filter
•
Stuck closed AFT Shutoff valve
•
Fuel Leak in Down Stream Injection (DSI)
System
•
FDP above maximum
•
Restricted fuel return line between filter
housing and fuel tank
•
Aftertreatment Fuel Injector (AFI) is
plugged or sticking
•
Leak in DSI system
•
AFT Fuel Doser sticking Open
•
AFI stuck Open
•
DSI failed system validation cycle
•
Biased AFTFIS or circuit
•
Biased Aftertreatment Fuel Pressure 2
(AFTFP2) sensor or circuit
•
Failed AFTFD or circuit
•
Failed AFTFSV or circuit
•
Aftertreatment Fuel Injector (AFI) failure
(plugged)
•
High DPF soot level
•
Low Fuel Delivery Pressure
•
Restricted AFI unit
•
Parked Regen Inhibited
•
Exhaust leak(s)
•
Biased DPFDP sensor
•
Biased IMP sensor
•
Low boost pressure
•
Level 1 DPF regen required
•
Level 2 DPF regen required
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