Komatsu Excavator Fault Codes Translation (E-Series)
• E01: Automatic system in HYPER system.
• E02: PC-EPC valve system.
• E03: Swing parking brake system.
• E04+CALL: Joystick neutral system in HYPER system.
• E05: Governor motor system.
• E06+CALL: EPC solenoid valve drive system in HYPER system.
• E09: HYPER-GX system closed / shut down.
• E101: Abnormality in fault history record.
• E102: Clock data abnormality.
• E103: Buzzer output short circuit (Buzzer drive harness in contact with 24V power line).
• E104: Air cleaner clogged.
• E108: Water temperature above 105°C (Engine coolant overheat).
• E112: Wiper motor forward drive system short circuit (New model).
• E113: Wiper motor reverse drive system short circuit (New model).
• E114: Window washer drive circuit short circuit (New model).
• E202: LS select solenoid valve circuit short circuit.
• E203: Swing parking brake solenoid valve circuit short circuit.
• E204: Pump merge/divide (confluence/divider) solenoid valve circuit short circuit.
• E205: Two-stage relief solenoid valve circuit short circuit.
• E206: Travel speed conversion solenoid valve circuit short circuit.
• E207: Quick mode solenoid valve circuit short circuit.
• E208: Quick mode solenoid valve circuit disconnection (open circuit).
• E213: Swing parking brake solenoid valve circuit disconnection (open circuit).
• E214: Pump merge/divide (confluence/divider) solenoid valve circuit disconnection (open circuit).
• E215: Two-stage relief solenoid valve circuit disconnection (open circuit).
• E216: Travel speed conversion solenoid valve circuit disconnection (open circuit).
• E217: Mode selection input fault.
• E218: Network response timeout fault.
• E222: LS-EPC solenoid valve circuit short circuit.
• E223: LS-EPC solenoid valve circuit disconnection (open circuit).
• E224: Front pump pressure sensor circuit abnormality.
• E225: Rear pump pressure sensor circuit abnormality.
• E226: Pressure sensor circuit power supply abnormality.
• E227: Engine speed sensor abnormality.
• E231: Active mode (Swing) solenoid valve circuit short circuit.
• E232: Front pump TVC solenoid valve circuit short circuit (Old model).
• E233: Front pump TVC solenoid valve circuit disconnection / open circuit (Old model).
• E235: Active mode (Swing) solenoid valve circuit disconnection (open circuit).
• E236: Rear pump TVC solenoid valve circuit short circuit.
• E237: Rear pump TVC solenoid valve circuit disconnection (open circuit).
• E302: Swing stroke control solenoid valve circuit short circuit.
• E303: Swing stroke control solenoid valve circuit disconnection (open circuit).
• E306: Feedback potentiometer circuit abnormality.
• E308: Fuel control dial input abnormality.
• E313: Automatic greasing controller fault (Optional).
• E315: Battery relay output circuit short circuit.
• E316: Governor motor out of synchronization (maladjustment).
• E317: Governor motor circuit disconnection (open circuit).
• E318: Governor motor circuit short circuit.

PC200-8 User Codes 
• E02: PC-EPC system.
• E03: Swing parking brake system.
• E10: Engine controller power supply fault, engine control drive system circuit fault (Engine stops).
• E11: Engine control system fault (Output power reduced to protect engine).
• E14: Feedback system abnormality.
• E15: Engine sensor (Coolant temperature, fuel pressure, oil pressure) fault.
• EOE: Network fault (KOMTRAX / Controller communication error).

⚙️ Engine System Fault Codes (CA-Codes & Controller Logs)
Controller Lock & Internal Errors
• 989L00: Engine controller lock warning (Mode 1).
• 989M00: Engine controller lock warning (Mode 2).
• 989N00: Engine controller lock warning (Mode 3).
• CA111: Engine controller internal failure.
• CA757: All data lost.
• CA633: Data transmission suspension fault.
Speed & Timing Sensors
• CA115: Engine speed sensor and backup speed sensor failure.
• CA234: Engine overspeed.
• CA238: Speed sensor power supply voltage fault.
• CA689: Engine speed sensor error.
• CA731: Engine backup speed sensor signal phase error.
• CA778: Engine backup speed sensor failure.
Intakes & Pressures (Boost/Ambient/Rail)
• CA122: Charge pressure sensor high feedback voltage error.
• CA123: Charge pressure sensor low feedback voltage error.
• CA221: Ambient pressure sensor high feedback voltage error.
• CA222: Ambient pressure sensor low feedback voltage error.
• CA449: Common rail pressure excessively high error.
• CA451: Common rail pressure sensor high feedback value error.
• CA452: Common rail pressure sensor low feedback value error.
• CA553: Common rail pressure excessively high error.
• CA559: Common rail pressure excessively low error.
• CA2249: Common rail pressure excessively low error.
Throttle & Power Supply
• CA131: Throttle dial sensor high feedback voltage error.
• CA132: Throttle dial sensor low feedback voltage error.
• CA187: Sensor power supply 2 high voltage error.
• CA227: Sensor power supply 2 high voltage error.
• CA352: Sensor power supply low voltage error.
• CA386: Sensor power supply high voltage error.
• CA441: Battery voltage low error.
• CA442: Battery voltage high error.
• CA2185: Throttle dial power supply high voltage error.
• CA2186: Throttle dial power supply low voltage error.
Temperatures (Coolant/Intake)
• CA144: Coolant temperature sensor high feedback voltage error.
• CA145: Coolant temperature sensor low feedback voltage error.
• CA153: Intake air temperature sensor high feedback voltage error.
• CA154: Intake air temperature sensor low feedback voltage error.
• CA155: Intake air temperature excessively high (Above limit value).
• CA488: Intake air temperature excessively high (Torque derating/reduction).
Actuators & Fuel Control (IMV/PCV/Preheat)
• CA271: IMV/PCV1 short circuit.
• CA272: IMV/PCV1 disconnection (open circuit).
• CA2311: IMV solenoid valve failure.
• CA2555: Intake air preheating high voltage error.
• CA2556: Intake air preheating low voltage error.
Injectors & Drivers 
• CA322: Injector 1 disconnection / short circuit fault.
• CA323: Injector 5 disconnection / short circuit fault.
• CA324: Injector 3 disconnection / short circuit fault.
• CA325: Injector 6 disconnection / short circuit fault.
• CA331: Injector 2 disconnection / short circuit fault.
• CA332: Injector 4 disconnection / short circuit fault.
• CA342: Correction code (QR code) incorrect.
• CA351: Injection drive circuit failure.
Fluids & Switches
• CA428: Fuel water-in-moisture (WIF) sensor high feedback voltage error.
• CA429: Fuel water-in-moisture (WIF) sensor low feedback voltage error.
• CA435: Engine oil pressure switch error.

🔌 Electrical & Hydraulic System Fault Codes (D-Codes)
Network & Configuration
• D19JKZ: Personalized code conversion abnormality.
• D862KA: GPS antenna disconnection (open circuit).
• DA22KK: Pump solenoid valve power supply low voltage error.
• DA25KP: 5V sensor power supply abnormality.
• DA29KQ: Mode selection abnormality.
• DA2RMC: CAN communication disconnection (Monitor).
Main Hydraulic Pumps & Temp Sensors
• DGH2KB: Hydraulic oil temperature sensor short circuit.
• DHPAMA: Front pump pressure sensor abnormality.
• DHPBMA: Rear pump pressure sensor abnormality.
• DHX1MA: Load sensor abnormality.
PPC Pressure Sensors 
• DHS3MA: Arm IN PPC pressure sensor abnormality.
• DHS4MA: Bucket IN PPC pressure sensor abnormality.
• DHS8MA: Boom RAISE PPC pressure sensor abnormality.
• DHSAMA: Right Swing PPC pressure sensor abnormality.
• DHSBMA: Left Swing PPC pressure sensor abnormality.
• DHSDMA: Bucket OPEN PPC pressure sensor abnormality.
Solenoid Valves (Disconnection “KA” vs Short Circuit “KB”)
• DW43KA: Travel high/low speed conversion solenoid valve disconnection.
• DW43KB: Travel high/low speed conversion solenoid valve short circuit.
• DW45KA: Swing holding brake solenoid valve disconnection.
• DW45KB: Swing holding brake solenoid valve short circuit.
• DW91KA: Two-stage relief solenoid valve disconnection.
• DW91KB: Travel confluence solenoid valve short circuit.
• DWA2KA: Standby (attachment) solenoid valve disconnection.
• DWA2KB: Standby (attachment) solenoid valve short circuit.
• DWK0KA: Two-stage relief solenoid valve disconnection.
• DWK0KB: Two-stage relief solenoid valve short circuit.
• DXA8KA: Front pump PC-EPC solenoid valve disconnection.
• DXA8KB: Front pump PC-EPC solenoid valve short circuit.
• DXA9KA: Rear pump PC-EPC solenoid valve disconnection.
• DXA9KB: Rear pump PC-EPC solenoid valve short circuit.
• DXE0KA: LS-EPC solenoid valve disconnection.
• DXE0KB: LS-EPC solenoid valve short circuit.
• DXE4KA: Emergency EPC circuit disconnection.
• DXE4KB: Emergency EPC circuit short circuit.
• DXE5KA: Pump merge/divide main solenoid valve disconnection.
• DXE5KB: Pump merge/divide main solenoid valve short circuit.
• DXE6KA: Pump merge/divide LS solenoid valve disconnection.
• DXE6KB: Pump merge/divide LS solenoid valve short circuit.
Cabin Utilities (Wiper/Washer)
• DY20KA: Wiper operation abnormality.
• DY20MA: Wiper parking abnormality.
• DY2CKA: Window washer motor disconnection.
• DY2CKB: Window washer motor short circuit.