Controls and Operating
3-40
NOTICE: Possible FMIs, for an explanation of the code see the table
under the heading Failure Mode Identifiers.
SPN SPN Name SPN Description
FMI
a
4341 Aftertreatment 1 SCR Catalyst
Reagent Line Heater 1 Prelimi-
nary FMI
Used to identify the applicable J1939-73 FMI
detected in the SCR catalyst reagent line
heater 1, by the manufacturer’s control soft-
ware in exhaust bank 1.
2,3,5,6
4374 Aftertreatment 1 SCR Catalyst
Reagent Pump Motor Speed
Rotational speed of the motor driving a pump
for reagent used in an aftertreatment system.
0,1,2,3,5,6
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