Caterpillar Excavator Fault Codes and Troubleshooting Guide - June 14, 2025
Understanding Caterpillar Excavator Error Codes
When operating Caterpillar (CAT) excavators, encountering fault codes is part of routine maintenance and diagnostics. These codes help identify potential issues within the machine's engine and hydraulic systems. This comprehensive guide, brought to you by Growshine International, a leading provider of aftermarket engineering machinery parts, heavy truck parts, agricultural machinery parts, and auto parts, will help you understand these codes and troubleshoot common problems. We specialize in the import and export of high-quality replacement parts for various machinery, ensuring your operations run smoothly. Our extensive catalog includes components for Caterpillar, Komatsu, Volvo, and many other leading brands.
Engine Fault Codes
These codes typically relate to the engine's performance and sensors. For instance, 001 to 006 indicate issues with individual cylinder injectors. Code 041 points to an 8-volt DC power supply problem, while 091 suggests a malfunction in the throttle position sensor. Maintaining the correct fuel and oil pressure is crucial, and codes like 095 (fuel filter pressure difference), 100 (engine oil pressure), and 289 (fuel pressure before filter) are vital for diagnostics. Temperature sensors also play a key role; codes 110 (engine coolant temperature), 172 (intake manifold air temperature), and 174 (fuel temperature) help identify issues. Engine speed is monitored by the 190 sensor. Electrical system voltage is indicated by code 168. Further codes include 253 (personality module), 261 (engine timing calibration), 262 (5-volt DC sensor power), 268 (programming parameters fault), 342 (secondary engine speed sensor), 460 (fuel secondary filter pressure), 617 (intake heater relay), 1779 (fuel common rail 1# pressure valve coil), 1785 (intake manifold pressure sensor), 1797 (common rail pressure sensor), 1834 (ignition key switch), 2417 (auxiliary start circuit for C9 with ether injection), and 544 (cooling fan speed sensor).
Machine Fault Codes (MID: 039)
These codes are specific to the machine's operational systems. Code 041 here also refers to an 8-volt sensor power issue. 096 indicates a problem with the fuel level sensor, while 127 relates to the transmission pressure sensor. The speed sensor output is indicated by 191. Similar to the engine codes, 262 signifies a 5-volt sensor power problem, and 268 relates to programming parameters. Brake limit switch issues are shown by 298. Solenoids control various hydraulic functions, with codes like 370 (boom float), 374 (swing brake), 735 (lifting), and 882 (hydraulic lock). The starting system is monitored by 444 (start relay) and 590 (engine control). Hydraulic oil temperature is crucial, indicated by 600. Directional pressure switches are 726 (right turn) and 727 (left turn). Other components include 1130 (left ATT pedal position sensor), 1326 (ECM position code), 1401 & 1402 (pump 1 & 2 pressure sensors), 1482 (10V sensor power), 1530 (quick coupler solenoid), 1588 (2# electronic controller), 1615 (single/double way solenoid), 1617 (swing shaft solenoid), 1621 (alternator solenoid), 1622 (travel lock magnet), 1628 & 1629 (main pump power shift solenoid), 1630 (swing pump solenoid), 1657 (left joystick), 1658 (right joystick), 2247 (supply pump inlet pressure sensor for C9 with electric oil pump), 1639 (machine security system module C9), 3575 (pump 1 flow limit pressure solenoid), 3576 (pump 2 flow limit pressure solenoid), 1960 (cigarette lighter), 2110 (machine tilt sensor), 2104 (travel motor swash plate angle limit solenoid), 2210 (right operation lever), 2129 (pilot control solenoid), 2142 (straight travel pedal position sensor), 2149 (travel pilot pressure solenoid), 2184 & 2185 (medium pressure hydraulic circuit port B & A solenoids), 2213 & 2214 (2# auxiliary valve port B & A solenoids), 2256 (hydraulic adjustment solenoid), 2447 (travel motor bypass solenoid), 2543 (joystick steering control switch), 2544 (left boom compensation solenoid), 2545 (right boom compensation solenoid), 2546 (hydraulic oil tank high-pressure outlet sensor), 2547 (hydraulic oil tank low-pressure outlet sensor), 2592 & 2593 (auxiliary valve A & B port flow solenoids), 2594 (hammer solenoid), 2599 & 2600 (auxiliary valve A & B port reversing solenoids), 2649 (auxiliary valve load sensing solenoid), 2665 (boom anti-drift valve), 2666 (boom regeneration valve), 2667 (?), 17 (engine stop solenoid), 2668 (hydraulic control port start switch), 3257 (intake heater), 3766 (user identification module SIM card), 3574 (pump 2 reverse flow control pressure reducing pressure sensor).
Event Codes
These codes indicate specific events or conditions that have occurred. E096 signifies high fuel pressure, while E198 means low fuel pressure. An E265 code indicates a user-defined shutdown, and E360 warns of low oil pressure. High engine coolant temperature triggers E361, and E362 indicates engine overspeed. High fuel temperature is shown by E363, and a blocked fuel filter is indicated by E390. Common rail fuel pressure issues are flagged by E396 (high) and E398 (low). High intake manifold temperature is E539, and high intake manifold pressure is E1044. Code E194 means high exhaust temperature, E232 indicates high water level in the oil-water separator, and E861 requests manual clock calibration. Low intake manifold pressure is E1045. An E179 code suggests the alternator is not charging, E017 is a warning for high engine coolant temperature, and E600 warns of high hydraulic oil temperature.
Failure Mode Identifier (FMI) Codes
FMIs provide further details about the nature of the fault:
0: Data valid but above normal operating range.
1: Data valid but below normal operating range.
2: Data erratic, intermittent, or incorrect.
3: Voltage above normal or shorted high.
4: Voltage below normal or shorted low.
5: Current below normal or open circuit.
6: Current above normal or shorted to ground.
7: Mechanical system not responding properly.
8: Abnormal frequency, pulse width, or period.
9: Abnormal update rate.
10: Abnormal rate of change.
11: Failure mode not identifiable.
12: Bad device or component.
13: Out of calibration.
14: Parameter not available for calibration.
15: Parameter not available.
16: Parameter out of range.
17: Module not responding.
18: Sensor supply fault.
19: Condition not met.
20: Parameter failed.
Specific Machine ECM Codes
Here are some ECM codes for specific Caterpillar excavator models:
39 Machine ECM (300D:B4M1)
105 Machine ECM (345C:STD Controller)
39 Machine ECM (365C, 385C; ABL2C+)
36 Engine ECM (ADEM)
106 Attachment Controller (345C:ATT Controller)
30 Monitor
124 MSS
122 Product Link
Component Code (CID)
4+8V DC Power Supply
91 Throttle Position Sensor
96 Fuel Level Sensor
100 Oil Pressure Sensor
110 Engine Coolant Temperature Sensor
145+12V DC Power Supply
167 Alternator Charging Voltage Sensor
168 Electrical System Voltage
171 Atmospheric Temperature Sensor
190 Engine Speed Sensor
246 CAN Data Link
247 SAE J1939 Data Link
248 CAT Data Link
1969 Boom Cylinder Head End Pressure Sensor
3012 Boom Cylinder Retract Pilot Pressure Sensor
3572 Swing Pilot Pressure Sensor
3573 Pump 1 Reverse Flow Control Pressure Reducing Pressure Sensor
3574 Pump 2 Reverse Flow Control Pressure Reducing Pressure Sensor
253 Personality Module
254 Electronic Control Module
262 5-Volt Sensor DC Power Supply
263 Digital Sensor Power Supply (8 Volt or 12 Volt)
268 Programmable Parameter Error
271 Alarm Horn
291 Engine Cooling Fan Solenoid
295 Large Hydraulic Excavator Control Module
324 Alarm Light (Action)
362 Engine Fan Speed Control Solenoid
374 Swing Brake Solenoid
376 Travel Alarm
379 Machine Automatic Lubrication Pressure Sensor
466 Left Travel Control Pedal Position Sensor
467 Right Travel Control Pedal Position Sensor
485 Automatic Reversing Fan Solenoid
544 Engine Cooling Fan Speed Sensor
545 Ether Injection Control Relay
558 Automatic Lubrication Relay
581 Power Shift Solenoid
583 Boom Raise Solenoid
586 Engine Speed Dial Switch
587 Engine Governor Position Sensor
558 Monitoring System Display Screen
590 Engine Control Module
598 Travel Speed Solenoid
600 Hydraulic Oil Temperature Sensor
732 Fine Swing Solenoid
735 Heavy Lift Mode Solenoid
790 Swing Pump (Output) Pressure Sensor
799 Service Tool
864 Hydraulic Pump Pressure Sensor
1073 VIDS Display Screen Module
1118 Neutral Flow Bypass Solenoid
1119 Boom Anti-Drift Valve
1120 Stick Anti-Drift Valve
1121 Front System High Pressure Solenoid
1124 Anti-Theft Solenoid
1125 Left Joystick Forward/Backward Position Sensor
1126 Left Joystick Left/Right Position Sensor
1127 Right Joystick Forward/Backward Position Sensor
1128 Right Joystick Left/Right Position Sensor
1129 Right Attachment Pedal Sensor
1130 Left Attachment Pedal Sensor
1131 Joystick 1# Switch
1132 Joystick 4# Switch
1138 Boom Cylinder Rod End Retract Solenoid
1139 Stick Cylinder Rod End Extend Solenoid
1140 Stick Cylinder Rod End Retract Solenoid
1141 Bucket Cylinder Rod End Extend Solenoid
1142 Bucket Cylinder Rod End Retract Solenoid
1143 Right Swing Solenoid
1144 Left Swing Solenoid
1145 Attachment Extend Solenoid
1146 Attachment Retract Solenoid
1147 Medium Pressure Circuit 1# A Solenoid
1148 Medium Pressure Circuit 1# B Solenoid
1149 Boom Lowering Prevent/Adjust Solenoid
1150 Swing Pump Swash Plate Angle Solenoid
1155 Implement Pump Power Shift Pressure Solenoid
1159 Stick Lowering Prevent/Adjust Solenoid
1160 Hydraulic Lock Solenoid
1161 Front Pump Pressure Sensor
1162 Rear Pump Pressure Sensor
1163 Left Travel Backward Solenoid
1164 Right Travel Backward Solenoid
1165 Right Travel Forward Solenoid
1166 Left Travel Forward Solenoid
1178 Machine Overload Alarm Pressure Sensor
1191 Main Hydraulic Valve
1192 Swing Valve
1193 Boom Cylinder Rod End Extend Solenoid
1522 Relief Valve 2# One-Way Valve Solenoid
1523 Relief Valve 1# One-Way Valve Solenoid
1525 Straight Travel Solenoid
1590 Main Pump Flow Limit Pressure Solenoid
1591 Negative Flow Control Stable Pressure Sensor
1593 Attachment 1# Extend Pressure Solenoid
1594 Attachment 2# Extend Pressure Solenoid
1595 Attachment 3# Extend Pressure Solenoid
1596 Attachment 1# Extend/Retract Solenoid
1597 Attachment 2# Extend/Retract Solenoid
1598 Attachment 3# Extend/Retract Solenoid
1609 F2 Type Valve Load Sensing Pressure Sensor
1615 One-Way/Two-Way Valve Solenoid
1657 Left Joystick Thumb Wheel
1658 Right Joystick Thumb Wheel
1659 F1 Type Valve Load Sensing Pressure Sensor
1660 Left Pump Negative Flow Control Pressure Solenoid
1661 Right Pump Negative Flow Control Pressure Solenoid
1662 F1 Type Valve Flow Solenoid
1663 4# Attachment Valve Extend Solenoid
1664 4# Attachment Valve Retract Solenoid
1665 1# Relief Valve Pressure Solenoid
1666 2# Relief Valve Pressure Solenoid
1680 Right Pump Bypass to Tank Solenoid
1688 Left Pump Negative Flow Control Pressure Sensor
1689 Right Pump Negative Flow Control Pressure Sensor
1849 Engine Fan Reversing Relay
1931 Auxiliary Circuit Flow Solenoid
2265 1# Hydraulic Pump Output Pressure Sensor
2266 2# Hydraulic Pump Output Pressure Sensor
2280 Travel Alarm Relay
2300 Switch Panel
Event Codes (E) Specific to Machine ECM
E096 Fuel Pressure High
E162 Inlet Pressure High
E198 Fuel Pressure Low
E256 Emergency Stop Switch Pressed
E360 Oil Pressure Low
E361 Engine Coolant Temperature High
E362 Engine Overspeed
E390 Fuel Filter Blocked
E539 Intake Temperature Too High
Failure Mode Identifier (FMI) Codes Specific to Machine ECM
0 Data Valid But Above Normal
1 Data Valid But Below Normal
2 Data Erratic, Intermittent, or Incorrect
3 Voltage Above Normal or Shorted High
4 Voltage Below Normal or Shorted Low
5 Current Below Normal or Open Circuit
6 Current Above Normal or Shorted to Ground
7 Mechanical System Not Responding Properly
8 Abnormal Frequency, Pulse Width, or Period
9 Abnormal Update Rate
10 Abnormal Rate of Change
11 Not Identifiable
12 Failed Device or Component
13 Calibration Fault
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Our key product offerings include: excavator hydraulic pumps, diesel engine parts, transmission components, cooling system parts, fuel system components, hydraulic valves, undercarriage parts, filters for heavy equipment, sensors for excavators, solenoids for construction machinery, engine control units (ECUs), alternators for trucks, brake system parts for agricultural vehicles, turbochargers for diesel engines, water pumps for construction equipment, oil coolers for excavators, hydraulic cylinders, gaskets and seals, and bearings for heavy machinery.
Glossary of Key Machinery Parts
Understanding the terminology is essential for effective troubleshooting:
卡特彼勒 345D 风扇马达 (Caterpillar 345D Fan Motor) (Катерпиллер 345D вентилятор мотора): Installed in the cooling system of the Caterpillar 345D excavator, this hydraulic motor drives the radiator fan, regulating engine temperature.
小松 PC200-8 主泵 (Komatsu PC200-8 Main Pump) (Коматсу PC200-8 основной насос): The core component of the hydraulic system in the Komatsu PC200-8 excavator, it generates the high-pressure oil flow needed for all hydraulic functions like digging and lifting.
沃尔沃 EC220D 挖掘机液压油缸 (Volvo EC220D Excavator Hydraulic Cylinder) (Вольво EC220D экскаватор гидравлический цилиндр): Part of the arm and boom mechanism of the Volvo EC220D excavator, these cylinders use hydraulic power to move the arm and bucket for excavation tasks.
五十铃 6HK1 发动机曲轴 (Isuzu 6HK1 Engine Crankshaft) (Исузу 6HK1 двигатель коленчатый вал): A critical component within the Isuzu 6HK1 engine, found in various machinery, it converts the reciprocating motion of the pistons into rotational motion to power the equipment.
奔驰 Actros 卡车空气滤清器 (Mercedes-Benz Actros Truck Air Filter) (Мерседес-Бенц Actros грузовик воздушный фильтр): Located in the intake system of the Mercedes-Benz Actros truck, this filter cleans the incoming air, preventing dust and debris from entering the engine.
约翰迪尔 8245R 拖拉机喷油器 (John Deere 8245R Tractor Fuel Injector) (Джон Дир 8245R трактор топливный инжектор): Part of the fuel system in the John Deere 8245R tractor, it precisely sprays fuel into the combustion chamber for efficient engine operation.
现代 R300LC-9S 挖掘机行走马达 (Hyundai R300LC-9S Excavator Travel Motor) (Хендай R300LC-9S экскаватор ходовой двигатель): This hydraulic motor powers the tracks of the Hyundai R300LC-9S excavator, enabling the machine to move around the job site.
中国重汽 Howo 卡车离合器片 (Sinotruk Howo Truck Clutch Disc) (Синотрак Howo грузовик диск сцепления): Situated in the drivetrain of the Sinotruk Howo truck, the clutch disc transmits power from the engine to the transmission, allowing for gear changes.
久保田 V3800DI 发动机水泵 (Kubota V3800DI Engine Water Pump) (Кубота V3800DI двигатель водяной насос): Part of the cooling system in the Kubota V3800DI engine, used in various applications, it circulates coolant to regulate engine temperature.
丰田 Camry 汽车氧气传感器 (Toyota Camry Car Oxygen Sensor) (Тойота Camry автомобиль кислородный датчик): Located in the exhaust system of the Toyota Camry car, this sensor monitors the oxygen levels in the exhaust gases to optimize fuel efficiency and reduce emissions.
Growshine International specializes in providing high-quality aftermarket parts for Caterpillar, including engine components, hydraulic parts, and electrical components. We also offer a wide selection of parts for other leading brands in the engineering machinery, heavy truck, agricultural machinery, and automotive industries. Our commitment is to ensure you receive the right parts quickly and efficiently to minimize downtime.
For all your Caterpillar excavator parts needs, including sensors, solenoids, pumps, filters, and more, rely on Growshine International. We are your global partner for quality and reliable machinery parts.
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