Kenworth – Peterbilt OBD/OBD2 Codes

For OBD2 codes on post 2009 vehicles please see Kenworth OBD2 code list and Peterbilt OBD2 code list. These codes are related to Paccar engines. Kenworth / Peterbilt / Paccar are owned by the same company. We also provide engine sensor locations for the Paccar MX13 engine on this page.

Catepillar C7 OBD1 Codes

Pre 2008 Kenworth / Peterbilt heavy duty vehicles may have Caterpillar engines like the C7 or C15 which uses flash codes.

Use the following procedure to retrieve the diagnostic codes if the engine is equipped with a “DIAGNOSTIC” lamp:

Turn the ignition key to the ON position. The engine does not need to be started in order to view codes. The engine does not need to be running while the ignition switch is in the ON position.The “DIAGNOSTIC” lamp blinks on and off at five second intervals.
- When the ignition key is in the ON position, the lamp is checked for proper operation. If there are any active codes except for Code 34, the codes are displayed at this time.
Note: The “DIAGNOSTIC” lamp will illuminate for five seconds. The lamp will stay on if there is an active diagnostic code.
The Active Diagnostic codes will always be flashed. There is no toggle switch that will shut off the lamp.
The “DIAGNOSTIC” lamp will flash in order to indicate a two-digit code. The sequence of flashes represents the system diagnostic message. Each digit of the two-digit code is determined by counting the number of flashes. The lamp flashes at a rate of two times per second. The lamp will pause for one second between digits. The lamp will pause for two seconds between codes.

The table below indicates the potential effect on the engine performance with active flash codes as well as a list of electronic diagnostic codes and descriptions.


	Diagnostic Flash Codes for C7 Industrial Engine
Diagnostic Flash Code		Effect On Engine Performance				Suggested Action by the Operator
Diagnostic Flash Code		Engine Misfire	Low Power	Reduced Engine Speed	Engine Shut Down	Shut down the Engine ⁽¹⁾	Service ⁽²⁾	Schedule Service for the Engine. ⁽³⁾
15	Open or Short Circuit of Injection Actuation Pressure Sensor		X			X
17	High Injection Actuation Pressure					X	X
18	Open or Short for the Injection Actuation Pressure Control Valve				X		X
21	Sensor Supply Voltage Above Normal or Below Normal ⁽⁴⁾		X					X
24	Oil Pressure Sensor Fault ⁽⁴⁾							X
25	Inlet Manifold Air Pressure Sensor Fault ⁽⁵⁾							X
26	Atmospheric Pressure Sensor Fault ⁽⁴⁾		X					X
27	Coolant Temperature Sensor Fault ⁽⁴⁾		X	X				X
28	Check the Adjustments for the Throttle Position Sensor.		X	X				X
34	Loss Of Engine RPM Signal			X	X		X
35	Event for Engine Overspeed				X			X
37	Fuel Pressure Sensor Fault ⁽⁴⁾							X
38	Inlet Manifold Air Temperature Sensor Fault ⁽⁴⁾		X	X				X
39	Mechanical Failure of the Injection Actuation Pressure Sensor		X				X
42	Check the Calibration of the Timing Sensor.	X	X	X		X		X
46	Low Oil Pressure Event				X	X	X
51	Intermittent Battery Power to the ECM	X	X		X	X	X
52	Personality Module Fault	X	X	X	X		X
56	The following parameters must be checked: Customer and System		X	X				X
59	Incorrect Engine Software	X	X	X				X
61	Event for High Coolant Temperature		X		X	X	X
62	Event for Low Coolant Level		X		X	X	X
63	Low Fuel Pressure Event		X	X		X	X
64	Even for High Inlet Manifold Air Temperature		X		X			X
72	Fault of Cylinder 1 or Cylinder 2	X	X				X
73	Fault of Cylinder 3 or Cylinder 4	X	X				X
74	Fault of Cylinder 5 or Cylinder 6	X	X				X

^( 1 )	Shut down the Engine: Operate the engine cautiously. Get immediate service. Severe engine damage may result.
^( 2 )	The operator should go to the nearest location for service.
^( 3 )	The operator should investigate the problem at a convenient time.
^( 4 )	The Diagnostic Flash Codes reduce the effectiveness of the Engine Monitoring feature.
^( 5 )	These Diagnostic Flash Codes may affect the system only under specific environmental conditions such as engine start-up at cold temperatures, etc.

C13, C15, C18 OBD1 Codes


C13 / C15 / C18 Diagnostic Trouble Codes
J1939 Code and Description	CDL Code and Description	Troubleshooting Procedure	Flash Codes
29-2 Accelerator Pedal Position 2 : Erratic, Intermittent, or Incorrect	774-2 Secondary Throttle Position Sensor:Erratic, Intermittent, or Incorrect	Troubleshooting, “Speed Control – Test”	N/A
29-3 Accelerator Pedal Position 2 : Voltage Above Normal	774-3 Secondary Throttle Position Sensor:Voltage Above Normal	Troubleshooting, “Speed Control – Test”	N/A
29-4 Accelerator Pedal Position 2 : Voltage Below Normal	774-4 Secondary Throttle Position Sensor:Voltage Below Normal	Troubleshooting, “Speed Control – Test”	N/A
29-8 Accelerator Pedal Position 2 : Abnormal Frequency, Pulse Width, or Period	774-8 Secondary Throttle Position Sensor:Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “Speed Control – Test”	N/A
91-2 Accelerator Pedal Position 1 : Erratic, Intermittent, or Incorrect	91-2 Throttle Position Sensor : Erratic, Intermittent, or Incorrect	Troubleshooting, “Speed Control – Test”	N/A
91-3 Accelerator Pedal Position 1 : Voltage Above Normal	91-3 Throttle Position Sensor : Voltage Above Normal	Troubleshooting, “Speed Control – Test”	N/A
91-4 Accelerator Pedal Position 1 : Voltage Below Normal	91-4 Throttle Position Sensor : Voltage Below Normal	Troubleshooting, “Speed Control – Test”	N/A
91-8 Accelerator Pedal Position 1 : Abnormal Frequency, Pulse Width, or Period	91-8 Throttle Position Sensor : Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “Speed Control – Test”	N/A
100-3 Engine Oil Pressure : Voltage Above Normal	100-3 Engine Oil Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	152
100-4 Engine Oil Pressure : Voltage Below Normal	100-4 Engine Oil Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	152
100-13 Engine Oil Pressure : Calibration Required	100-13 Engine Oil Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	197
101-3 Engine Crankcase Pressure : Voltage Above Normal	101-3 Crankcase Air Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
101-4 Engine Crankcase Pressure : Voltage Below Normal	101-4 Crankcase Air Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
101-13 Engine Crankcase Pressure : Calibration Required	101-13 Crankcase Air Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	N/A
108-3 Barometric Pressure : Voltage Above Normal	274-3 Atmospheric Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	152
108-4 Barometric Pressure : Voltage Below Normal	274-4 Atmospheric Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	152
108-13 Barometric Pressure : Calibration Required	274-13 Atmospheric Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	197
108-21 Barometric Pressure : Data Drifted Low	274-21 Atmospheric Pressure Sensor:Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
110-3 Engine Coolant Temperature : Voltage Above Normal	110-3 Engine Coolant Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	133
110-4 Engine Coolant Temperature : Voltage Below Normal	110-4 Engine Coolant Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	133
158-2 Keyswitch Battery Potential : Erratic, Intermittent, or Incorrect	1834-2 Ignition Key Switch loss of signal	Troubleshooting, “Electrical Power Supply – Test”	439
168-2 Battery Potential / Power Input 1 : Erratic, Intermittent, or Incorrect	168-2 Electrical System Voltage : Erratic, Intermittent, or Incorrect	Troubleshooting, “Electrical Power Supply – Test”	422
168-3 Battery Potential / Power Input 1 : Voltage Above Normal	168-3 Electrical System Voltage : Voltage Above Normal	Troubleshooting, “Electrical Power Supply – Test”	422
168-4 Battery Potential / Power Input 1 : Voltage Below Normal	168-4 Electrical System Voltage : Voltage Below Normal	Troubleshooting, “Electrical Power Supply – Test”	422
172-3 Engine Air Inlet Temperature : Voltage Above Normal	2526-3 Air Inlet Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	133
172-4 Engine Air Inlet Temperature : Voltage Below Normal	2526-4 Air Inlet Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	133
174-3 Engine Fuel Temperature 1 : Voltage Above Normal	174-3 Fuel Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	165
174-4 Engine Fuel Temperature 1 : Voltage Below Normal	174-4 Fuel Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	165
190-8 Engine Speed : Abnormal Frequency, Pulse Width, or Period	190-8 Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “Speed/Timing – Test”	141
411-3 Engine Exhaust Gas Recirculation Differential Pressure : Voltage Above Normal	3387-3 EGR Differential Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
411-4 Engine Exhaust Gas Recirculation Differential Pressure : Voltage Below Normal	3387-4 EGR Differential Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
411-13 Engine Exhaust Gas Recirculation Differential Pressure : Calibration Required	3387-13 EGR Differential Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	N/A
412-3 Engine Exhaust Gas Recirculation Temperature : Voltage Above Normal	3386-3 EGR Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
412-4 Engine Exhaust Gas Recirculation Temperature : Voltage Below Normal	3386-4 EGR Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
626-5 Engine Start Enable Device 1 : Current Below Normal	2417-5 Ether Injection Control Solenoid : Current Below Normal	Troubleshooting, “Ether Starting Aid – Test”	N/A
626-6 Engine Start Enable Device 1 : Current Above Normal	2417-6 Ether Injection Control Solenoid : Current Above Normal	Troubleshooting, “Ether Starting Aid – Test”	N/A
630-2 Calibration Memory : Erratic, Intermittent, or Incorrect	268-2 Programmed Parameter Fault : Erratic, Intermittent, or Incorrect	Troubleshooting, “Configuration Parameters”	527
631-2 Calibration Module : Erratic, Intermittent, or Incorrect	253-2 Personality Module : Erratic, Intermittent, or Incorrect	Troubleshooting, “ECM Software – Install”	N/A
637-11 Engine Timing Sensor : Other Failure Mode	261-11 Engine Timing Offset fault	Troubleshooting, “Timing – Calibrate”	143
637-13 Engine Timing Sensor : Calibration Required	261-13 Engine Timing Calibration : Calibration Required	Troubleshooting, “Timing – Calibrate”	143
651-5 Engine Injector Cylinder #01 : Current Below Normal	1-5 Cylinder #1 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	111/139
651-6 Engine Injector Cylinder #01 : Current Above Normal	1-6 Cylinder #1 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	111/139
652-5 Engine Injector Cylinder #02 : Current Below Normal	2-5 Cylinder #2 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	112/139
652-6 Engine Injector Cylinder #02 : Current Above Normal	2-6 Cylinder #2 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	112/139
653-5 Engine Injector Cylinder #03 : Current Below Normal	3-5 Cylinder #3 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	113/139
653-6 Engine Injector Cylinder #03 : Current Above Normal	3-6 Cylinder #3 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	113/139
654-5 Engine Injector Cylinder #04 : Current Below Normal	4-5 Cylinder #4 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	114/139
654-6 Engine Injector Cylinder #04 : Current Above Normal	4-6 Cylinder #4 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	114/139
655-5 Engine Injector Cylinder #05 : Current Below Normal	5-5 Cylinder #5 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	115/139
655-6 Engine Injector Cylinder #05 : Current Above Normal	5-6 Cylinder #5 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	115/139
656-5 Engine Injector Cylinder #06 : Current Below Normal	6-5 Cylinder #6 Injector : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	116/139
656-6 Engine Injector Cylinder #06 : Current Above Normal	6-6 Cylinder #6 Injector : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	116/139
677-5 Engine Starter Motor Relay : Current Below Normal	444-5 Starter Motor Relay : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
677-6 Engine Starter Motor Relay : Current Above Normal	444-6 Starter Motor Relay : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
678-3 ECU 8 Volts DC Supply : Voltage Above Normal	41-3 8 Volt DC Supply : Voltage Above Normal	Troubleshooting, “Sensor Supply – Test”	N/A
678-4 ECU 8 Volts DC Supply : Voltage Below Normal	41-4 8 Volt DC Supply : Voltage Below Normal	Troubleshooting, “Sensor Supply – Test”	N/A
723-8 Engine Speed Sensor #2 : Abnormal Frequency, Pulse Width, or Period	342-8 Secondary Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “Speed/Timing – Test”	142
1072-5 Engine (Compression) Brake Output #1 : Current Below Normal	2533-5 Compression Brake Low/High Solenoid : Current Below Normal	Troubleshooting, “Retarder – Test”	N/A
1072-6 Engine (Compression) Brake Output #1 : Current Above Normal	2533-6 Compression Brake Low/High Solenoid : Current Above Normal	Troubleshooting, “Retarder – Test”	N/A
1073-5 Engine (Compression) Brake Output #2 : Current Below Normal	2535-5 Compression Brake Medium/High Solenoid : Current Below Normal	Troubleshooting, “Retarder – Test”	N/A
1073-6 Engine (Compression) Brake Output #2 : Current Above Normal	2535-6 Compression Brake Medium/High Solenoid : Current Above Normal	Troubleshooting, “Retarder – Test”	N/A
1385-3 Auxiliary Temperature #1 : Voltage Above Normal	1836-3 Auxiliary Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
1385-4 Auxiliary Temperature #1 : Voltage Below Normal	1836-4 Auxiliary Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
1387-3 Auxiliary Pressure #1 : Voltage Above Normal	1835-3 Auxiliary Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
1387-4 Auxiliary Pressure #1 : Voltage Below Normal	1835-4 Auxiliary Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
2630-3 Engine Charge Air Cooler Outlet Temperature : Voltage Above Normal	3372-3 Engine Charge Air Cooler #1 Outlet Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
2630-4 Engine Charge Air Cooler Outlet Temperature : Voltage Below Normal	3372-4 Engine Charge Air Cooler #1 Outlet Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Passive) – Test”	N/A
2791-5 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Below Normal	3405-5 EGR Valve Control : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
2791-6 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Above Normal	3405-6 EGR Valve Control : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
2813-5 Engine Air Shutoff Command Status : Current Below Normal	3239-5 Air Shutoff Relay : Current Below Normal	Troubleshooting, “Air Shutoff – Test”	N/A
2813-6 Engine Air Shutoff Command Status : Current Above Normal	3239-6 Air Shutoff Relay : Current Above Normal	Troubleshooting, “Air Shutoff – Test”	N/A
2949-5 Engine Intake Valve Actuation System Oil Pressure Control Valve : Current Below Normal	1922-5 Intake Valve Actuation System Oil Pressure Solenoid : Current Below Normal	Troubleshooting, “Solenoid Valve- Test”	181
2949-6 Engine Intake Valve Actuation System Oil Pressure Control Valve : Current Above Normal	1922-6 Intake Valve Actuation System Oil Pressure Solenoid : Current Above Normal	Troubleshooting, “Solenoid Valve- Test”	181
2950-5 Engine Intake Valve Actuator #1 : Current Below Normal	1901-5 Intake Valve Actuator #1 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2950-6 Engine Intake Valve Actuator #1 : Current Above Normal	1901-6 Intake Valve Actuator #1 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2951-5 Engine Intake Valve Actuator #2 : Current Below Normal	1902-5 Intake Valve Actuator #2 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2951-6 Engine Intake Valve Actuator #2 : Current Above Normal	1902-6 Intake Valve Actuator #2 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2952-5 Engine Intake Valve Actuator #3 : Current Below Normal	1903-5 Intake Valve Actuator #3 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2952-6 Engine Intake Valve Actuator #3 : Current Above Normal	1903-6 Intake Valve Actuator #3 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2953-5 Engine Intake Valve Actuator #4 : Current Below Normal	1904-5 Intake Valve Actuator #4 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2953-6 Engine Intake Valve Actuator #4 : Current Above Normal	1904-6 Intake Valve Actuator #4 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2954-5 Engine Intake Valve Actuator #5 : Current Below Normal	1905-5 Intake Valve Actuator #5 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2954-6 Engine Intake Valve Actuator #5 : Current Above Normal	1905-6 Intake Valve Actuator #5 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2955-5 Engine Intake Valve Actuator #6 : Current Below Normal	1906-5 Intake Valve Actuator #6 : Current Below Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
2955-6 Engine Intake Valve Actuator #6 : Current Above Normal	1906-6 Intake Valve Actuator #6 : Current Above Normal	Troubleshooting, “Variable Valve Actuator – Test”	N/A
3241-3 Exhaust Gas Temperature 1 : Voltage Above Normal	3485-3 Aftertreatment #1 Exhaust Gas Temperature #1 Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	186
3241-4 Exhaust Gas Temperature 1 : Voltage Below Normal	3485-4 Aftertreatment #1 Exhaust Gas Temperature #1 Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	186
3242-3 Particulate Trap Intake Gas Temperature : Voltage Above Normal	2452-3 DPF #1 Intake Temperature Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3242-4 Particulate Trap Intake Gas Temperature : Voltage Below Normal	2452-4 DPF #1 Intake Temperature Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3251-2 Particulate Trap Differential Pressure : Erratic, Intermittent, or Incorrect	2458-2 DPF #1 Differential Pressure Sensor : Erratic, Intermittent, or Incorrect	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3251-3 Particulate Trap Differential Pressure : Voltage Above Normal	2458-3 DPF #1 Differential Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3251-4 Particulate Trap Differential Pressure : Voltage Below Normal	2458-4 DPF #1 Differential Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3358-3 Engine Exhaust Gas Recirculation Inlet Pressure : Voltage Above Normal	3385-3 EGR Intake Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3358-4 Engine Exhaust Gas Recirculation Inlet Pressure : Voltage Below Normal	3385-4 EGR Intake Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3358-13 Engine Exhaust Gas Recirculation Inlet Pressure : Calibration Required	3385-13 EGR Intake Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	197
3358-21 Engine Exhaust Gas Recirculation Inlet Pressure : Data Drifted Low	3385-21 EGR Intake Pressure Sensor : Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
3479-5 Aftertreatment #1 Fuel Pressure Control : Current Below Normal	2461-5 ARD Fuel Pressure #1 Control : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
3479-6 Aftertreatment #1 Fuel Pressure Control : Current Above Normal	2461-6 ARD Fuel Pressure #1 Control : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
3480-3 Aftertreatment #1 Fuel Pressure #1 : Voltage Above Normal	2460-3 ARD Fuel Pressure #1 Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3480-4 Aftertreatment #1 Fuel Pressure #1 : Voltage Below Normal	2460-4 ARD Fuel Pressure #1 Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3484-5 Aftertreatment #1 Ignition : Current Below Normal	2465-5 Aftertreatment #1 Ignition Transformer Primary : Current Below Normal	Troubleshooting, “ARD Ignition – Test”	N/A
3484-6 Aftertreatment #1 Ignition : Current Above Normal	2465-6 Aftertreatment #1 Ignition Transformer Primary : Current Above Normal	Troubleshooting, “ARD Ignition – Test”	N/A
3487-5 Aftertreatment #1 Air Pressure Control : Current Below Normal	2489-5 ARD Air Pressure Control Actuator : Current Below Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3487-6 Aftertreatment #1 Air Pressure Control : Current Above Normal	2489-6 ARD Air Pressure Control Actuator : Current Above Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3487-7 Aftertreatment #1 Air Pressure Control : Not Responding Properly	2489-7 ARD Air Pressure Control Actuator : Not Responding Properly	Troubleshooting, “ARD Combustion Air – Test”	N/A
3487-8 Aftertreatment #1 Air Pressure Control : Abnormal Frequency, Pulse Width, or Period	2489-8 ARD Air Pressure Control Actuator : Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “ARD Combustion Air – Test”	N/A
3487-13 Aftertreatment #1 Air Pressure Control : Out of Calibration	2489-13 ARD Air Pressure Control Actuator: Out of Calibration	Troubleshooting, “ARD Combustion Air Valve – Replace”
3488-3 Aftertreatment #1 Air Pressure Actuator Position : Voltage Above Normal	2490-3 ARD Air Pressure Control Actuator Position Sensor : Voltage Above Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3488-4 Aftertreatment #1 Air Pressure Actuator Position : Voltage Below Normal	2490-4 ARD Air Pressure Control Actuator Position Sensor : Voltage Below Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3509-3 Sensor Supply Voltage 1 : Voltage Above Normal	262-3 5 Volt Sensor DC Power Supply : Voltage Above Normal	Troubleshooting, “Sensor Supply – Test”	516
3509-4 Sensor Supply Voltage 1 : Voltage Below Normal	262-4 5 Volt Sensor DC Power Supply : Voltage Below Normal	Troubleshooting, “Sensor Supply – Test”	516
3510-3 Sensor Supply Voltage 2 : Voltage Above Normal	2131-3 5 Volt Sensor DC Power Supply #2 : Voltage Above Normal	Troubleshooting, “Sensor Supply – Test”	516
3510-4 Sensor Supply Voltage 2 : Voltage Below Normal	2131-4 5 Volt Sensor DC Power Supply #2 : Voltage Below Normal	Troubleshooting, “Sensor Supply – Test”	516
3511-3 Sensor Supply Voltage 3 : Voltage Above Normal	3482-3 Sensor Supply #3 : Voltage Above Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3511-4 Sensor Supply Voltage 3 : Voltage Below Normal	3482-4 Sensor Supply #3 : Voltage Below Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
3563-3 Engine Intake Manifold #1 Absolute Pressure : Voltage Above Normal	1785-3 Intake Manifold Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	197
3563-4 Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal	1785-4 Intake Manifold Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	197
3563-13 Engine Intake Manifold #1 Absolute Pressure : Calibration Required	1785-13 Intake Manifold Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	197
3563-21 Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low	1785-21 Intake Manifold Pressure Sensor : Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
3609-3 DPF #1 Intake Pressure : Voltage Above Normal	3464-3 DPF #1 Intake Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3609-4 DPF #1 Intake Pressure : Voltage Below Normal	3464-4 DPF #1 Intake Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3609-13 DPF #1 Intake Pressure : Calibration Required	3464-13 DPF #1 Intake Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	N/A
3609-21 DPF #1 Intake Pressure : Data Drifted Low	3464-21 DPF #1 Intake Pressure Sensor : Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
3659-5 Engine Injector Cylinder #1 Actuator #2 : Current Below Normal	2602-5 Cylinder #1 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3659-6 Engine Injector Cylinder #1 Actuator #2 : Current Above Normal	2602-6 Cylinder #1 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3660-5 Engine Injector Cylinder #2 Actuator #2 : Current Below Normal	2604-5 Cylinder #2 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3660-6 Engine Injector Cylinder #2 Actuator #2 : Current Above Normal	2604-6 Cylinder #2 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3661-5 Engine Injector Cylinder #3 Actuator #2 : Current Below Normal	2606-5 Cylinder #3 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3661-6 Engine Injector Cylinder #3 Actuator #2 : Current Above Normal	2606-6 Cylinder #3 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3662-5 Engine Injector Cylinder #4 Actuator #2 : Current Below Normal	2608-5 Cylinder #4 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3662-6 Engine Injector Cylinder #4 Actuator #2 : Current Above Normal	2608-6 Cylinder #4 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3663-5 Engine Injector Cylinder #5 Actuator #2 : Current Below Normal	2610-5 Cylinder #5 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3663-6 Engine Injector Cylinder #5 Actuator #2 : Current Above Normal	2610-6 Cylinder #5 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3664-5 Engine Injector Cylinder #6 Actuator #2 : Current Below Normal	2612-5 Cylinder #6 Injector Actuator #2 : Current Below Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3664-6 Engine Injector Cylinder #6 Actuator #2 : Current Above Normal	2612-6 Cylinder #6 Injector Actuator #2 : Current Above Normal	Troubleshooting, “Injector Solenoid – Test”	N/A
3695-2 Particulate Trap Regeneration Inhibit Switch : Erratic, Intermittent, or Incorrect	3184-2 DPF Regeneration Inhibit Switch : Erratic, Intermittent, or Incorrect	The Forced regeneration switch is installed and the disable regeneration switch is held for longer than 1 minute or the Forced regeneration switch is NOT installed and the disable regeneration input through the Datalink is received for longer than 1 minute.	N/A
3837-3 Aftertreatment 1 Secondary Air Pressure : Voltage Above Normal	3493-3 Aftertreatment #1 Secondary Air Pressure Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3837-4 Aftertreatment 1 Secondary Air Pressure : Voltage Below Normal	3493-4 Aftertreatment #1 Secondary Air Pressure Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
3837-13 Aftertreatment 1 Secondary Air Pressure : Calibration Required	3493-13 Aftertreatment #1 Secondary Air Pressure Sensor : Calibration Required	Troubleshooting, “Sensor Calibration Required – Test”	N/A
3837-21 Aftertreatment 1 Secondary Air Pressure : Data Drifted Low	3493-21 Aftertreatment #1 Secondary Air Pressure Sensor : Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
4077-3 Aftertreatment #1 Fuel Pressure #2 : Voltage Above Normal	2497-3 ARD Fuel Pressure #2 Sensor : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
4077-4 Aftertreatment #1 Fuel Pressure #2 : Voltage Below Normal	2497-4 ARD Fuel Pressure #2 Sensor : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
4265-5 Aftertreatment #1 Transformer Secondary Output : Current Below Normal	3180-5 Aftertreatment #1 Ignition Transformer Secondary : Current Below Normal	Troubleshooting, “ARD Ignition – Test”	N/A
4301-5 Aftertreatment #1 Fuel Injector #1 Heater Control : Current Below Normal	3182-5 Aftertreatment #1 Fuel Injector #1 Heater : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
4301-6 Aftertreatment #1 Fuel Injector #1 Heater Control : Current Above Normal	3182-6 Aftertreatment #1 Fuel Injector #1 Heater : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
4783-3 DPF #1 Mean Soot Signal : Voltage Above Normal	3397-3 DPF #1 Soot Loading Sensor : Voltage Above Normal	Troubleshooting, “Soot Sensor – Test”	N/A
4783-4 DPF #1 Mean Soot Signal : Voltage Below Normal	3397-4 DPF #1 Soot Loading Sensor : Voltage Below Normal	Troubleshooting, “Soot Sensor – Test”	N/A
4783-9 DPF #1 Mean Soot Signal : Abnormal Update Rate	3397-9 DPF #1 Soot Loading Sensor : Abnormal Update Rate	Troubleshooting, “Data Link – Test”	N/A
4783-12 DPF #1 Mean Soot Signal : Failure	3397-12 DPF #1 Soot Loading Sensor : Failure	Replace the soot sensor. Perform the “DPF Soot Loading Sensor Functional Test” on Cat ET. Refer to Troubleshooting, “Soot Sensor – Test”.	N/A
4783-13 DPF #1 Mean Soot Signal : Out of Calibration	3397-13 DPF #1 Soot Loading Sensor : Calibration Required	Replace the soot sensor. Perform the “DPF Soot Loading Sensor Functional Test” on Cat ET. Refer to Troubleshooting, “Soot Sensor – Test”.	N/A
4783-19 DPF #1 Mean Soot Signal : Data Error	3397-19 DPF #1 Soot Loading Sensor : Data Error	Replace the soot sensor. Perform the “DPF Soot Loading Sensor Functional Test” on Cat ET. Refer to Troubleshooting, “Soot Sensor – Test”.	N/A
4783-21 DPF #1 Mean Soot Signal : Data Drifted Low	3397-21 DPF #1 Soot Loading Sensor : Data Drifted Low	Troubleshooting, “Soot Sensor – Test”	N/A
5276-5 Engine Exhaust Manifold Bank #1 Flow Balance Valve Actuator Control : Current Below Normal	3409-5 Engine Exhaust Manifold Bank #1 Flow Balance Valve Solenoid : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5276-6 Engine Exhaust Manifold Bank #1 Flow Balance Valve Actuator Control : Current Above Normal	3409-6 Engine Exhaust Manifold Bank #1 Flow Balance Valve Solenoid : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5423-5 Aftertreatment #1 Fuel Pump Relay Control : Current Below Normal	3427-5 Aftertreatment Fuel Pump Relay : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5423-6 Aftertreatment #1 Fuel Pump Relay Control : Current Above Normal	3427-6 Aftertreatment Fuel Pump Relay : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5424-5 Aftertreatment #1 Fuel Flow Diverter Valve Control : Current Below Normal	3413-5 ARD Fuel Flow Diverter Actuator : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5424-6 Aftertreatment #1 Fuel Flow Diverter Valve Control : Current Above Normal	3413-6 ARD Fuel Flow Diverter Actuator : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5425-5 Aftertreatment #1 Fuel Pressure #2 Actuator Control : Current Below Normal	3391-5 ARD Fuel Pressure #2 Control Actuator : Current Below Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5425-6 Aftertreatment #1 Fuel Pressure #2 Actuator Control : Current Above Normal	3391-6 ARD Fuel Pressure #2 Control Actuator : Current Above Normal	Troubleshooting, “Solenoid Valve – Test”	N/A
5495-14 Aftertreatment #1 DPF Soot Mean Calibration Offset : Special Instruction	3397-14 DPF #1 Soot Loading Sensor : Special Instruction	Troubleshooting, “Data Link Configuration Status – Test”	N/A
5576-2 Aftertreatment #1 Identification : Erratic, Intermittent, or Incorrect	3468-2 Aftertreatment #1 Identification Number Module : Erratic, Intermittent, or Incorrect	Troubleshooting, “Aftertreatment Identification Module – Test”	N/A
5576-8 Aftertreatment #1 Identification : Abnormal Frequency, Pulse Width, or Period	3468-8 Aftertreatment #1 Identification Number Module : Abnormal Frequency, Pulse Width, or Period	Troubleshooting, “Aftertreatment Identification Module – Test”	N/A
5576-14 Aftertreatment #1 Identification : Special Instruction	3468-14 Aftertreatment #1 Identification Number Module : Special Instruction	Troubleshooting, “Data Link Configuration Status – Test”	N/A
5580-3 Engine Filtered Fuel Delivery Absolute Pressure : Voltage Above Normal	460-3 Fuel Pressure Sensor – After Fuel Filter : Voltage Above Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
5580-4 Engine Filtered Fuel Delivery Absolute Pressure : Voltage Below Normal	460-4 Fuel Pressure Sensor – After Fuel Filter : Voltage Below Normal	Troubleshooting, “Sensor Signal (Analog, Active) – Test”	N/A
5580-21 Engine Filtered Fuel Delivery Absolute Pressure : Data Drifted Low	460-21 Fuel Pressure Sensor – After Fuel Filter : Data Drifted Low	Troubleshooting, “Sensor Supply – Test”	N/A
5591-3 Aftertreatment #1 DPF Air Control Module : Voltage Above Normal	3472-3 ARD Air Pressure Control System : Voltage Above Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
5591-4 Aftertreatment #1 DPF Air Control Module : Voltage Below Normal	3472-4 ARD Air Pressure Control System : Voltage Below Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
5591-5 Aftertreatment #1 DPF Air Control Module : Current Below Normal	3471-5 ARD Air Pressure Control Module : Current Below Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
5591-6 Aftertreatment #1 DPF Air Control Module : Current Above Normal	3471-6 ARD Air Pressure Control Module : Current Above Normal	Troubleshooting, “ARD Combustion Air – Test”	N/A
5591-9 Aftertreatment #1 DPF Air Control Module : Abnormal Update Rate	3472-9 ARD Air Pressure Control System : Abnormal Update Rate	Troubleshooting, “ARD Combustion Air – Test”	N/A
5591-14 Aftertreatment #1 DPF Air Control Module : Special Instruction	3472-14 ARD Air Pressure Control System : Special Instruction	Troubleshooting, “Data Link Configuration Status – Test”	N/A