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Section 2-1
Diagnostic Fault Codes For Cummins Engines
Applies to Engine Models QSB T2, QSC T2, QSL T2, QSM11, QSX15, QSK19, QSK23, QST30, QSK45/60/78
Note: These fault codes are current at date of publication. Always refer to engine service manual for the latest information
related to engine diagnostics and troubleshooting. Contact your local Cummins dealer for more information.
Fault Fault Severity Action To Be Taken By Operator
Severity Function
Level
1 Stop Stop Engine Now – Damage Imminent
2 Warning Warning – Engine May Continue to Run,
but Must Be Repaired the Same Day
3 Maintenance Maintenance – Repair At The Next PM
4 None- Information None – No Lamp Action
Only
80-1044 Rev 5/2013
1
FAULT SID(S)
CODE PID(P) SPN DESCRIPTION 1 5 30 QSK45 QSK60 QSK78
T HHP Level
(LAMP) FMI FMI QSB QSC QSL9 QSM1 QSX1 QSK19QSK23QS Number (**)
111 S254 629 Engine Control Module – Critical internal
failure X X X X X X X X 3 3 3
(Red) 12 12
112 S020 635 Engine Timing Actuator is not
responding to ECM commands X X 2 2 2
(Red) 7 7
113 S020 635 Engine Timing Actuator Circuit - shorted
high X X X 2 2 2
(Yellow) 3 3
114 S020 635 Engine Timing Actuator Circuit - shorted
low X
(Yellow) 4 4
115 P190 190 Engine Speed/Position Sensor Circuit -
lost both of two signals from the X X X X X X X X 2 2 2
(Red) 2 2 magnetic pickup sensor
116 P156 156 Fuel Timing Pressure Sensor Circuit -
shorted high X X X X 2 2 2
(Red) 3 3
117 P156 156 Fuel Timing Pressure Sensor Circuit -
shorted low X X X X 2 2 2
(Red) 4 4
118 P135 135 Fuel Pump Delivery Pressure Sensor
Circuit - shorted high X X X X 3 3 3
(Yellow) 3 3
119 P135 135 Fuel Pump Delivery Pressure Sensor
Circuit - shorted low X X X X 3 3 3
(Yellow) 4 4
121 P190 190 Engine Speed/Position Sensor Circuit -
lost one of two signals from the X X X X X X X 2 2 2
(Yellow) 10 10 magnetic pickup sensor
122 P102 102 Intake Manifold Pressure Sensor #1
Circuit - shorted high X X X X X X X X 2 2 2
(Yellow) 3 3
123 P102 102 Intake Manifold Pressure Sensor #1
Circuit - shorted low X X X X X X X X 2 2 2
(Yellow) 4 4
124* 102 High Intake Manifold Pressure Left Bank
(Yellow) 16 X 3 3 3
125* 102 Low Intake Manifold Pressure Left Bank
(None) 18 X 3 3 3
126* 1129 High Intake Manifold Pressure Right
Bank X 3 3 3
(Yellow) 16
127* 1129 Low Intake Manifold Pressure Right
Bank X 3 3 3
(None) 18
128* 1129 Right Bank Intake Manifold Pressure
Sensor Circuit Failed High X 3 3 3
(None) 3
(*) Denotes Cense Fault codes
(**) HHP QSK45/60/78 Fault Severity Levels:
Level 1: Stop Engine Now Level 3: Repair at Next PM
Level 2: Re
pair Engine Same Day Level 4: Information Only
2
FAULT SID(S)
CODE PID(P) SPN DESCRIPTION 1 5 30 QSK45 QSK60 QSK78
T HHP Level
(LAMP) FMI FMI QSB QSC QSL9 QSM1 QSX1 QSK19QSK23QS Number (**)
129* 1129 Right Bank Intake Manifold Pressure
Sensor Circuit Failed Low X 3 3 3
(None) 4
131 P091 091 Accelerator Pedal Position Sensor
Circuit - shorted high X X X X X X X X 2 2 2
(Red) 3 3
132 P091 091 Accelerator Pedal Position Sensor
Circuit - shorted low X X X X X X X X 2 2 2
(Red) 4 4
133 P029 974 Remote Accelerator Pedal Position
Sensor Circuit - shorted high X X X X X X
(Red) 3 3
133 P029 29 Remote Accelerator Pedal Position
Sensor Circuit - shorted high X X 2 2 2
(Red) 3 3
134 P029 974 Remote Accelerator Pedal Position
Sensor Circuit - shorted low X X X X X X
(Red) 4 4
134 P029 29 Remote Accelerator Pedal Position
Sensor Circuit - shorted low X X 2 2 2
(Red) 4 4
135 P100 100 Engine Oil Pressure Sensor Circuit -
shorted high X X X X X X X X 2 2 2
(Yellow) 3 3
136* 1208 Pre Filter Oil Pressure Sensor Circuit
Failed High X 3 3 3
(None) 3
137* 1208 Pre Filter Oil Pressure Sensor Circuit
Failed Low X 3 3 3
(None) 4
141 P100 100 Engine Oil Pressure Sensor Circuit -
shorted low X X X X X X X X 2 2 2
(Yellow) 4 4
143 P100 100 Engine Oil Pressure Low – Warning
(Yellow) 1 18 X X X X X X
143 P100 100 Engine Oil Pressure Low – Warning
(White) 1 1 X X 1 1 1
144 P110 110 Engine Coolant Temperature Sensor
Circuit - shorted high X X X X X X X X 2 2 2
(Yellow) 3 3
145 P110 110 Engine Coolant Temperature Sensor
Circuit - shorted low X X X X X X X X 2 2 2
(Yellow) 4 4
146 P110 110 Engine Coolant Temperature High –
Warning X X X
(Yellow) 0 16
147 P091 091 Accelerator Pedal Position Sensor
Circuit - low frequency X X X X X X X X 2 2 2
(Red) 8 8
148 P091 091 Accelerator Pedal Position Sensor
Circuit - high frequency X X X X X X X X 2 2 2
(Red) 8 8
(*) Denotes Cense Fault codes
(**) HHP QSK45/60/78 Fault Severity Levels:
Level 1: Stop Engine Now Level 3: Repair at Next PM
Level 2: Re
pair Engine Same Day Level 4: Information Only
3
FAULT SID(S)
CODE PID(P) SPN DESCRIPTION 1 5 30 QSK45 QSK60 QSK78
T HHP Level
(LAMP) FMI FMI QSB QSC QSL9 QSM1 QSX1 QSK19QSK23QS Number (**)
151 P110 110 Engine Coolant Temperature High –
Critical X X X X X X
(Red) 0 0
151 P110 110 Engine Coolant Temperature High –
Critical X X 1 1 1
(White) 0 0
153 P105 105 Intake Manifold Temperature Sensor #1
Circuit - shorted high X X X X X X X X 2 2 2
(Yellow) 3 3
154 P105 105 Intake Manifold Temperature Sensor #1
Circuit - shorted low X X X X X X X X 2 2 2
(Yellow) 4 4
155 P105 105 Intake Manifold Temperature #1 High -
Critical X X X X X X
(Red) 0 0
155 P105 105 Intake Manifold Temperature #1 High –
Critical X X 1 1 1
(White) 0 0
156* 1131 Left Bank Rear Intake Manifold Temp
Sensor Circuit Failed High 2 2 2
(Yellow) 3
157* 1131 Left Bank Rear Intake Manifold Temp
Sensor Circuit Failed Low 2 2 2
(Yellow) 4
158* 1131 High Intake Manifold Temp - Left Bank
Rear 1 1 1
(White) 0
159* 1132 Right Bank Front Intake Manifold
Temperature Sensor Circuit Failed High 2 2 2
(Yellow) 3
161* 1132 Right Bank Front Intake Manifold
Temperature Sensor Circuit Failed Low 2 2 2
(Yellow) 4
162* 1132 High Intake Manifold Temperature -
Right Bank Front 1 1 1
(White) 0
163* 1133 Right Bank Rear Intake Manifold
Temperature Sensor Circuit Failed High 2 2 2
(Yellow) 3
164* 1133 Right Bank Rear Intake Manifold
Temperature Sensor Circuit Failed Low 2 2 2
(Yellow) 4
165* 1133 High Intake Manifold Temperature -
Right Bank Rear 1 1 1
(White) 0
166 S024 733 Rack Position Sensor #1 Circuit -
shorted high X
(Yellow) 3 3
172 S023 638 Rack Actuator Position #1 Circuit -
grounded circuit X
(Red) 6 6
173 S023 638 Rack Actuator - mechanically stuck open
(Yellow) 7 7 X
(*) Denotes Cense Fault codes
(**) HHP QSK45/60/78 Fault Severity Levels:
Level 1: Stop Engine Now Level 3: Repair at Next PM
Level 2: Repair Engine Same Day Level 4: Information Only
4
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