Unlock Your Komatsu Excavator's Potential: Understanding Fault Codes - June 14, 2025
Understanding the fault codes of your Komatsu excavator is crucial for efficient maintenance and minimizing downtime. This comprehensive guide provides a detailed breakdown of user codes and service codes for various Komatsu excavator models, including PC200-6, PC300-6, PC400-6, PC200-7, PC200-8, and PC200LC-8. Growshine International (格莳国际), a leading importer and exporter of engineering machinery parts, brings you this essential information to keep your operations running smoothly.
Komatsu PC200-6/PC300-6/PC400-6/PC200-7 Fault Codes
These models display fault codes and user codes automatically when an issue arises.
User Codes (Automatically Displayed)
| Code | Description |
|---|---|
| E01 | HYPER system automatic mode system. |
| E02 | PC-EPC system. |
| E03 | Swing parking brake system. |
| E04+CALL | HYPER system joystick neutral system. |
| E05 | Governor motor system. |
| E06+CALL | HYPER system EPC solenoid valve drive system. |
| E09+CALL | HYPER-GX system shutdown. HYPER joystick and EPC solenoid valve drive system. |
Service Codes (Requires Switching Operation)
| Code | Description |
|---|---|
| E101 | Fault history record abnormal. |
| E102 | Clock data abnormal. |
| E103 | Buzzer output short circuit, buzzer drive harness in contact with 24V power line. |
| E104 | Air filter clogged. |
| E108 | Water temperature above 105℃. |
| E112 | Wiper motor drive forward system short circuit (new models). |
| E113 | Wiper motor drive reverse system short circuit (new models). |
| E114 | Washer drive circuit short circuit (new models). |
| E202 | LS select solenoid valve circuit short circuit. |
| E203 | Swing parking brake solenoid valve circuit short circuit. |
| E204 | Pump confluence/diversion solenoid valve circuit short circuit. |
| E205 | Secondary relief solenoid valve circuit short circuit. |
| E206 | Travel speed conversion solenoid valve circuit short circuit. |
| E207 | Fast mode solenoid valve circuit short circuit. |
| E208 | Fast mode solenoid valve circuit open circuit. |
| E213 | Swing parking brake solenoid valve circuit open circuit. |
| E214 | Pump confluence/diversion solenoid valve circuit open circuit. |
| E215 | Secondary relief solenoid valve circuit open circuit. |
| E216 | Travel speed conversion solenoid valve circuit short circuit. |
| E217 | Mode selection input failure. |
| E218 | Network response timeout failure. |
| E222 | LS-EPC solenoid valve circuit short circuit. |
| E223 | LS-EPC solenoid valve circuit open circuit. |
| E224 | Front pump pressure sensor circuit abnormal. |
| E225 | Rear pump pressure sensor circuit abnormal. |
| E226 | Pressure sensor circuit power supply abnormal. |
| E227 | Engine speed sensor abnormal. |
| E231 | Activation mode (swing) solenoid valve circuit short circuit. |
| E232 | Front pump TVC solenoid valve circuit short circuit (old models). |
| E233 | Front pump TVC solenoid valve circuit open circuit (old models). |
| E235 | Activation mode (swing) solenoid valve circuit open circuit. |
| E236 | Rear pump TVC solenoid valve circuit short circuit. |
| E237 | Rear pump TVC solenoid valve circuit open circuit. |
| E302 | Swing stroke control solenoid valve circuit short circuit. |
| E303 | Swing stroke control solenoid valve circuit open circuit. |
| E306 | Feedback potentiometer circuit abnormal. |
| E308 | Fuel dial input abnormal. |
| E313 | Automatic grease supply controller failure (optional). |
| E315 | Battery relay output circuit short circuit. |
| E316 | Governor motor misalignment. |
| E317 | Governor motor circuit open circuit. |
| E318 | Governor motor circuit short circuit. |
Komatsu PC200-8/PC200LC-8 Fault Codes
The PC200-8 series utilizes an electronically controlled engine, resulting in different user codes compared to the PC200-6/7 models.
User Codes
| Code | Description |
|---|---|
| E02 | PC-EPC system. |
| E03 | Swing parking brake system. |
| E10 | Engine controller power failure, engine control drive system circuit failure (engine stops). |
| E11 | Engine control system failure (reduces output power to protect the engine). |
| E14 | Feedback system abnormal. |
| E15 | Engine sensor (water temperature, fuel pressure, oil pressure) failure. |
| EOE | Network failure. |
Fault Codes
| Code | Description |
|---|---|
| 989L00 | Engine controller lockout warning (mode 1). |
| 989M00 | Engine controller lockout warning (mode 2). |
| 989N00 | Engine controller lockout warning (mode 3). |
| CA111 | EMC critical internal failure. |
| CA115 | Engine Ne and Bkup speed sensor failure. |
| CA122 | Charge pressure sensor feedback voltage high failure. |
| CA123 | Charge pressure sensor feedback voltage low failure. |
| CA131 | Throttle dial sensor feedback voltage high failure. |
| CA132 | Throttle dial sensor feedback voltage low failure. |
| CA144 | Coolant temperature sensor feedback voltage high failure. |
| CA145 | Coolant temperature sensor feedback voltage low failure. |
| CA153 | Charge temperature sensor feedback voltage high failure. |
| CA154 | Charge temperature sensor feedback voltage low failure. |
| CA155 | Charge temperature extremely high (over limit). |
| CA187 | Sensor power supply 2 voltage low failure. |
| CA221 | Ambient pressure sensor feedback voltage high failure. |
| CA222 | Ambient pressure sensor feedback voltage low failure. |
| CA227 | Sensor power supply 2 voltage high failure. |
| CA234 | Engine overspeed. |
| CA238 | Ne speed sensor power supply voltage failure. |
| CA271 | IMV/PCV1 short circuit failure. |
| CA272 | IMV/PCV1 open circuit failure. |
| CA322 | #1 Injector (L#1) open/short circuit failure. |
| CA323 | #5 Injector (L#5) open/short circuit failure. |
| CA324 | #3 Injector (L#3) open/short circuit failure. |
| CA325 | #6 Injector (L#6) open/short circuit failure. |
| CA331 | #2 Injector (L#2) open/short circuit failure. |
| CA332 | #4 Injector (L#4) open/short circuit failure. |
| CA342 | Calibration code incorrect. |
| CA351 | Injection drive circuit failure. |
| CA352 | Sensor power supply voltage low failure. |
| CA386 | Sensor power supply voltage high failure. |
| CA428 | Fuel water content sensor feedback voltage high failure. |
| CA429 | Fuel water content sensor feedback voltage low failure. |
| CA435 | Engine oil pressure switch failure. |
| CA441 | Battery voltage low failure. |
| CA442 | Battery voltage high failure. |
| CA449 | Rail pressure extremely high. |
| CA451 | Rail pressure sensor feedback value high failure. |
| CA452 | Rail pressure sensor feedback value low failure. |
| CA488 | Charge temperature high (torque decrease). |
| CA553 | Rail pressure high failure. |
| CA559 | Rail pressure low failure. |
| CA689 | Engine speed sensor failure. |
| CA731 | Engine backup speed sensor signal phase failure. |
| CA757 | All data lost. |
| CA778 | Engine backup speed sensor failure. |
| CA633 | Data communication pause failure. |
| CA2185 | Throttle dial power supply voltage high failure. |
| CA2186 | Throttle dial power supply voltage low failure. |
| CA2249 | Rail pressure extremely low failure. |
| CA2311 | IMV solenoid valve failure. |
| CA2555 | Intake preheat voltage high failure. |
| CA2556 | Intake preheat voltage low failure. |
| D19JKZ | Personalization code conversion abnormal. |
| D862KA | GPS antenna open circuit. |
| DA22KK | Pump solenoid valve power supply voltage low failure. |
| DA25KP | 5V sensor power supply abnormal. |
| DA29KQ | Mode selection abnormal. |
| DA2RMC | CAN open circuit (display). |
| DGH2KB | Hydraulic oil temperature sensor short circuit. |
| DHPAMA | Front pump pressure sensor abnormal. |
| DHPBMA | Rear pump pressure sensor abnormal. |
| DHS3MA | Boom cylinder extend PPC pressure sensor abnormal. |
| DHS4MA | Bucket cylinder crowd PPC pressure sensor abnormal. |
| DHS8MA | Boom cylinder lift PPC pressure sensor abnormal. |
| DHSAMA | Swing right PPC pressure sensor abnormal. |
| DHSBMA | Swing left PPC pressure sensor abnormal. |
| DHSDMA | Bucket cylinder dump PPC pressure sensor abnormal. |
| DHX1MA | Load sensor abnormal. |
| DW43KA | Travel high/low speed conversion solenoid valve open circuit. |
| DW43KB | Travel high/low speed conversion solenoid valve short circuit. |
| DW45KA | Swing holding solenoid valve open circuit. |
| DW45KB | Swing holding solenoid valve short circuit. |
| DW91KA | Secondary relief solenoid valve open circuit. |
| DW91KB | Travel confluence solenoid valve short circuit. |
| DWA2KA | Spare solenoid valve open circuit. |
| DWA2KB | Spare solenoid valve short circuit. |
| DWK0KA | Secondary relief solenoid valve open circuit. |
| DWK0KB | Secondary relief solenoid valve short circuit. |
| DXA8KA | Front pump PC-EPC solenoid valve open circuit. |
| DXA8KB | Front pump PC-EPC solenoid valve short circuit. |
| DXA9KA | Rear pump PC-EPC solenoid valve open circuit. |
| DXA9KB | Rear pump PC-EPC solenoid valve short circuit. |
| DXE0KA | LS-EPC solenoid valve open circuit. |
| DXE0KB | LS-EPC solenoid valve short circuit. |
| DXE4KA | Emergency EPC circuit open circuit. |
| DXE4KB | Emergency EPC circuit short circuit. |
| DXE5KA | Pump confluence/diversion main solenoid valve open circuit. |
| DXE5KB | Pump confluence/diversion main solenoid valve short circuit. |
| DXE6KA | Pump confluence/diversion LS solenoid valve open circuit. |
| DXE6KB | Pump confluence/diversion LS solenoid valve short circuit. |
| DY20KA | Wiper operation abnormal. |
| DY20MA | Wiper parking abnormal. |
| DY2CKA | Washer motor open circuit. |
| DY2CKB | Washer motor short circuit. |
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Glossary of Machinery Parts
Hydraulic Pump (液压泵 - гидравлический насос): The heart of the hydraulic system, converting mechanical power into hydraulic power. Located in the main hydraulic system. Example: Komatsu PC200-8 hydraulic pump.
Engine Filter (发动机滤清器 - воздушный фильтр двигателя): Removes contaminants from the engine's oil or air. Located on or near the engine. Example: Caterpillar 320L engine filter.
Transmission Component (变速器部件 - компонент трансмиссии): Part of the system that transfers power from the engine to the wheels or tracks. Located within the transmission housing. Example: Volvo LX25 transmission component.
Fuel Injector (燃油喷射器 - топливная форсунка): Delivers fuel into the engine's cylinders. Located on the engine's cylinder head. Example: Isuzu 6HK1 fuel injector.
Water Temperature Sensor (水温传感器 - датчик температуры воды): Measures the temperature of the engine coolant. Located in the engine's cooling system. Example: Komatsu PC1250LC-10 water temperature sensor.
Air Conditioning Compressor (空调压缩机 - компрессор кондиционера): Compresses refrigerant for the air conditioning system. Located in the engine compartment. Example: Hitachi EX135 air conditioning compressor.
Fan Motor (风扇马达 - мотор вентилятора): Drives the cooling fan for the engine or hydraulic system. Located near the radiator or hydraulic coolers. Example: Volvo Penta TAD881VE fan motor.
Track Link (链节 - звено гусеницы): A part of the track system on tracked vehicles. Located in the undercarriage. Example: XuGong XE35U track link.
Turbocharger (增压器 - турбокомпрессор): Increases the power of an engine by forcing more air into the combustion chamber. Located on the engine's exhaust manifold. Example: Deutz BF6M 2012 turbocharger.
Hydraulic Cylinder (液压缸 - гидравлический цилиндр): Converts hydraulic power into linear motion. Located on various parts of the machinery for lifting and moving. Example: Komatsu D85EX-15 hydraulic cylinder.
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Understanding these fault codes will help you diagnose issues quickly and ensure that you can source the correct parts for your Komatsu excavator. Growshine International (格莳国际) is here to support you with all your engineering machinery parts needs.
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