308E2 CR, 308E2 SR Mini Hydraulic Excavator Diagnostic Trouble Codes Caterpillar


Diagnostic Trouble Codes
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1.1. DTC = Component Identifier (CID) and Failure Mode Identifier (FMI) Information

The following is a list of Diagnostic Trouble Codes (DTCs) for the machines. When a diagnostic code becomes active, refer to the Troubleshooting section of this manual for a specific troubleshooting procedure.

Each test procedure listed in the diagnostic trouble code table below contains a simplified schematic with only the relevant components related to that test procedure. Though the schematics are electrically correct, not all the possible harness connectors are shown. Refer to the latest revision of the Electrical Schematic, UENR5516 to view the entire circuitry of the machine.

DTC = Component Identifier (CID) and Failure Mode Identifier (FMI) Information

Table 1
Machine ECM (MID 299) 
DTC  Description  Procedure 
41-3  8 VDC Supply : Voltage Above Normal  Sensor Supply - Test 
41-4  8 VDC Supply : Voltage Below Normal  Sensor Supply - Test 
96-3  Fuel Level Sensor : Voltage Above Normal  Sensor Signal (Analog, Passive) - Test 
96-4  Fuel Level Sensor : Voltage Below Normal  Sensor Signal (Analog, Passive) - Test 
262-3  5 VDC Supply: Voltage Above Normal  Sensor Supply - Test 
262-4  5 VDC Supply: Voltage Below Normal  Sensor Supply - Test 
590-9  Engine Control Module: Abnormal Update  CAN Data Link - Test 
600-3  Hydraulic Oil Temperature Sensor: Voltage Above Normal  Sensor Signal (Analog, Passive) - Test 
600-4  Hydraulic Oil Temperature Sensor: Voltage Below Normal  Sensor Signal (Analog, Passive) - Test 
1657-3  Left Joystick Thumbwheel: Voltage Above Normal  Sensor Signal (PWM) - Test 
1657-4  Left Joystick Thumbwheel: Voltage Below Normal  Sensor Signal (PWM) - Test 
1657-8  Left Joystick Thumbwheel: Abnormal Frequency, Pulse Width, or Period  Sensor Signal (PWM) - Test 
1968-3  Boom Cylinder Rod Pressure Sensor: Voltage Above Normal  Sensor Signal (PWM) - Test 
1968-4  Boom Cylinder Rod Pressure Sensor: Voltage Below Normal  Sensor Signal (PWM) - Test 
1969-3  Boom Cylinder Head Pressure Sensor: Voltage Above Normal  Sensor Signal (PWM) - Test 
1969-4  Boom Cylinder Head Pressure Sensor: Voltage Below Normal  Sensor Signal (PWM) - Test 
2426-3  Stick Angle Sensor: Voltage Above Normal  Potentiometer - Test 
2426-4  Stick Angle Sensor: Voltage Below Normal  Potentiometer - Test 
2430-3  Offset Boom Offset Angle Sensor: Voltage Above Normal  Potentiometer - Test 
2430-4  Offset Boom Offset Angle Sensor: Voltage Below Normal  Potentiometer - Test 
2448-9  Graphical Display Module: Abnormal Update Rate  CAN Data Link - Test 
2544-3  Offset Boom Offset Left Solenoid: Voltage Above Normal  Solenoid - Test 
2544-5  Offset Boom Offset Left Solenoid: Current Below Normal  Solenoid - Test 
2544-6  Offset Boom Offset Left Solenoid: Current Above Normal  Solenoid - Test 
2545-3  Offset Boom Offset Right Solenoid: Voltage Above Normal  Solenoid - Test 
2545-5  Offset Boom Offset Right Solenoid: Current Below Normal  Solenoid - Test 
2545-6  Offset Boom Offset Right Solenoid: Current Above Normal  Solenoid - Test 
4603-3  Boom Angle Sensor: Voltage Above Normal  Potentiometer - Test 
4603-4  Boom Angle Sensor: Voltage Below Normal  Potentiometer - Test 
5267-3  Bucket Lock Solenoid: Voltage Above Normal  Solenoid - Test 
5267-5  Bucket Lock Solenoid: Current Below Normal  Solenoid - Test 
5267-6  Bucket Lock Solenoid: Current Above Normal  Solenoid - Test 
5268-3  Stick In Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5268-5  Stick In Limit Solenoid: Current Below Normal  Solenoid - Test 
5268-6  Stick In Limit Solenoid: Current Above Normal  Solenoid - Test 
5269-3  Stick Out Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5269-5  Stick Out Limit Solenoid: Current Below Normal  Solenoid - Test 
5269-6  Stick Out Limit Solenoid: Current Above Normal  Solenoid - Test 
5270-3  Stick Out Away Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5270-5  Stick Out Away Limit Solenoid: Current Below Normal  Solenoid - Test 
5270-6  Stick Out Away Limit Solenoid: Current Above Normal  Solenoid - Test 
5280-3  Boom Lower Pilot Pressure Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5280-5  Boom Lower Pilot Pressure Limit Solenoid: Current Below Normal  Solenoid - Test 
5280-6  Boom Lower Pilot Pressure Limit Solenoid: Current Above Normal  Solenoid - Test 
5281-3  Boom Raise Pilot Pressure Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5281-5  Boom Raise Pilot Pressure Limit Solenoid: Current Below Normal  Solenoid - Test 
5281-6  Boom Raise Pilot Pressure Limit Solenoid: Current Above Normal  Solenoid - Test 
5282-3  Swing Right Pilot Pressure Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5282-5  Swing Right Pilot Pressure Limit Solenoid: Current Below Normal  Solenoid - Test 
5282-6  Swing Right Pilot Pressure Limit Solenoid: Current Above Normal  Solenoid - Test 
5283-3  Swing Left Pilot Pressure Limit Solenoid: Voltage Above Normal  Solenoid - Test 
5283-5  Swing Left Pilot Pressure Limit Solenoid: Current Below Normal  Solenoid - Test 
5283-6  Swing Left Pilot Pressure Limit Solenoid: Current Above Normal  Solenoid - Test 

Information System:

336D 2L and 340D 2L Excavators Machine Systems Gear Pump (Pilot) - Remove and Install
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Final Drive and Wheel
538 Forest Machine Machine Systems Relief Valve (Swing) - Test and Adjust
325F Excavator Engine Supplement Diesel Exhaust Fluid Pump - Remove and Install
Debris in Oil System Causing Repeat Failures of the (HEUI) Pump for Certain C7 and C9 Engines. {1126, 1251, 1318, 1378}
Procedure for Reinforcing Bracket As on Certain M Series Motor Graders {6158, 6159}
538 Forest Machine Machine Systems Swing Motor - Test - Measurement of Case Drain Oil
336D 2L and 340D 2L Excavators Machine Systems Main Control Valve - Remove and Install
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Differential
558 Forest Machine Machine Systems Relief Valve (Main) - Test and Adjust
558 Forest Machine Machine Systems Solenoid Valve (Proportional Reducing) - Calibrate - Power Shift Pressure
PM620, PM622, PM820, PM822 and PM825 Cold Planers Electronic System Event Codes
538 Forest Machine Machine Systems Travel Motor - Test - Measurement of Case Drain Oil
336D 2L and 340D 2L Excavators Machine Systems Pressure Reducing Valve (Implement and Swing Priority) - Remove and Install
Retrofitting Boom Lowering Control Valve/Stick Lowering Control Valve on 345D/349D/349D2 Excavators {5051, 5057, 5059, 5456, 5458}
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Disassemble - Front Hydrostatic Piston Motor
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Assemble - Front Hydrostatic Piston Motor
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Disassemble - Rear Hydrostatic Piston Motor
926M, 930M and 938M Wheel Loaders Power Train Piston Motor (Hydrostatic) - Assemble - Rear Hydrostatic Piston Motor
538 Forest Machine Machine Systems Relief Valve (Crossover) - Test and Adjust
Counterbalance Valves Are Now Used on Certain Hydraulic Excavator Forestry Grapples {5362, 5457, 5555, 6307}
336D2/336D2 GC Excavator Engine Supplement Turbocharger - Remove and Install
725C, 725C2, 730C, 730C2 and 730C, 730C2 EJECTOR Articulated Truck Systems Gear Motor (Hydraulic Fan)
336D 2L and 340D 2L Excavators Machine Systems Hydraulic Tank - Remove and Install