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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
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2013 Mack GU713. Engine serial #989613 Model #MP8-415C SCR

Customer Question

2013 Mack GU713. Engine serial #989613 Model #MP8-415C
SCR performance low. service SCR system. Engine derated to 5mph
Codes are: SPN 5246, SPN 4094 NOX, SPN 5443
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.

Hi my name is***** will be glad to help.

ECM SPN 5246, Aftertreatment SCR Operator Inducement Severity – MID

128 PSID 46 This code is thrown after the truck continues to operate after a fault has been detected.

ECM SPN 5443, Aftertreatment 1 Hydrocarbon Dosing System – MID 128

PPID 329

Group 28

Engine Control Module (ECM) Diagnostic Trouble

Codes (DTCs)

ECM SPN 5394, Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve

– MID 128 PSID 90

Type of

fault:

FMI Description:

Fault Condition:

Possible

Symptoms:

Possible Cause:

FMI 1

Data valid but below

normal operational

range

Dosing failure

Aftertreatment

Diesel Exhaust

Fluid(DEF)dosing

amount too low or

DEF quality

MIL illuminated

NOx emissions

too high

NOx sensor

SCR catalyst malfunction

EGR mass flow failure

SCR inlet temperature sensor

FMI 17

Data valid but below

normal operating

range - Least severe

level

Dosing failure

Aftertreatment

Diesel Exhaust

Fluid(DEF)dosing

amount too low or

DEF quality

MIL illuminated

NOx emissions

too high

NOx sensor

SCR catalyst malfunction

EGR mass flow failure

SCR inlet temperature sensor

ECM SPN 5443, Aftertreatment 1 Hydrocarbon Dosing System – MID 128

PPID 329

Type of

fault:

FMI Description:

Fault Condition:

Possible

Symptoms:

Possible Cause:

FMI 2

Fuel pressure fault

Aftertreatment

Fuel Pressure, not

within expected

range

Regeneration not

possible

Fuel pressure

Fuel line(s)

Aftertreatment Hydrocarbon Dosing

Module Fuel pressure fault

FMI 7

Mechanical system

not responding

properly

Regeneration not

possible

Fuel line(s)

Obstructed/dirty aftertreatment

hydrocarbon doser

Aftertreatment Hydrocarbon Dosing

Module

FMI 8

Fuel leakage

Aftertreatment

Fuel Pressure, not

within expected

range

Regeneration not

possible

Aftertreatment Hydrocarbon Dosing

Module

FMI 10

Abnormally large

variations

Regeneration not

possible

Fuel line(s)

Obstructed/dirty aftertreatment

hydrocarbon doser

Aftertreatment Hydrocarbon Dosing

Module

FMI 13

Calibration value out

of range

Air pressure, not

within expected

range

Regeneration not

possible

Low air pressure

Aftertreatment Hydrocarbon Dosing

Module

Expert:  Daniel Wilson replied 1 year ago.

ECM SPN 4094, NOx Limits Exceeded Due to Insufficient Diesel Exhaust

Fluid (DEF) Quality – MID 128 PSID 90

Type of

fault:

FMI Description:

Fault Condition:

Possible

Symptoms:

Possible Cause:

FMI 1

Data valid but below

normal operational

range - Most severe

level

Aftertreatment

Diesel Exhaust

Fluid(DEF)dosing

too low

Yellow Check

lamp illuminated

Engine derate

DEF quality

Aftertreatment DEF line clogged

Aftertreatment DEF doser

Aftertreatment control module failure

FMI 14

Special Instructions

Aftertreatment

Diesel Exhaust

Fluid(DEF)dosing

too low

Yellow Check

lamp illuminated

Engine derate

DEF quality

Aftertreatment DEF line clogged

Aftertreatment DEF doser

Aftertreatment control module failure

FMI 18

Data valid but below

normal operating

range - Moderately

severe level

Aftertreatment

Diesel Exhaust

Fluid(DEF)dosing

too low

Yellow Check

lamp illuminated

Engine derate

DEF quality

Aftertreatment DEF line clogged

Aftertreatment DEF doser

Aftertreatment control module failure

Expert:  Daniel Wilson replied 1 year ago.

Check your FMI numbers to narrow the potential cause of the fault closer to the descriptions I posted

Expert:  Daniel Wilson replied 1 year ago.

Let me know the results and if you need more help

Expert:  Daniel Wilson replied 1 year ago.

Hi Jonathan, Did you get this resolved?

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