215676 480 Revision A
8.4 Engine Error Codes
If an engine error occurs, the cab display module (CDM) will display an engine error code. Refer to the table below to learn
the meaning of the code.
The following example explains the segments of an error code:
If the cab display module (CDM) displays the Error Code 629S 12F 28C, this is the meaning of the parts of the code:
629S : S represents the J1939 SPN column. Locate code 629 in that column.
12F : F represents the FMI column. Locate code 12 in that column.
28C : C represents the occurrences (count); 28 is the quantity.
J1939 SPN description : Controller #1. The Cummins description of this is engine control module critical internal failure —
Bad intelligent device or component.
The Cummins Dealer will request the fault code that corresponds with the number that you have located in the J1939 SPN
column.
Cummins
Fault Code
J1939
SPN
J1939
FMI
Lamp
J1939 SPN Description Cummins Description
64
719 22 3
Amber Crankcase pressure Extended crankcase blow-by pressure circuit —
voltage above normal, or shorted to
high source
729 22
4
Amber Crankcase pressure Extended crankcase blow-by pressure circuit —
voltage below normal, or shorted to
low source
2114 52 0
Red Coolant temperature Coolant temperature 2 — data valid but above
normal operational range — most severe level
2111 52 3
Amber Coolant temperature Coolant temperature 2 sensor circuit — voltage
above normal, or shorted to high source
2112 52
4
Amber Coolant temperature Coolant temperature 2 sensor circuit — voltage
below normal, or shorted to low source
2113 52 16
Amber Coolant temperature Coolant temperature 2 — data valid but above
normal operational range — moderately
severe level
241 84 2
Amber Wheel-based vehicle
speed
Vehicle speed sensor circuit — data erratic,
intermittent, or incorrect
242 84 10
Amber Wheel-based vehicle
speed
Vehicle speed sensor circuit tampering has
been detected— abnormal rate of change
148 91 0
Red Accelerator pedal
position
Accelerator pedal or lever position sensor
circuit — abnormal frequency, pulse width,
or period
147
91
1
Red Accelerator pedal
position
Accelerator pedal or lever position sensor
circuit — abnormal frequency, pulse width,
or period
1242 91 2
Red Accelerator pedal
position
Accelerator pedal or lever position sensor 1
and 2 — data erratic, intermittent, or incorrect
131 91 3
Red Accelerator pedal
position
Accelerator pedal or lever position sensor
circuit — voltage above normal, or shorted to
high source
REFERENCE
64. The descriptions of Cummins J1939 SPN codes are subject to change at their discretion.