Komatsu Machinery is a leader in construction and heavy equipment manufacturing, providing durable and reliable machines to the industry. However, even the most robust machines can experience problems, and that’s where error codes come in handy. Error codes provide valuable insight into what might be causing the issue and help you diagnose the problem quickly.
By keeping an eye out for error codes and knowing what they mean, you can keep your Komatsu machinery running smoothly and avoid costly downtime. With a little bit of knowledge, you’ll be able to keep your equipment working to its fullest potential and help ensure your business runs smoothly.
Komatsu Fault Code List
| Error Code | Description |
| 989L00 | Error Code: Engine Controller Lockout Warning (Mode 1). |
| 989L00 | The Engine Controller Lock Warning (Mode 1) |
| 989M00 | Motor Controller For Blocking The Warning (Mode 2). |
| 989M00 | The Engine Controller To Lock Warning (Mode 2). |
| 989N00 | Motor Controller For Blocking The Warning (Mode 3). |
| 989N00 | The Engine Controller To Lock Warning (Mode 3). |
| AA10NX | Air Filter Clogging. |
| AA10NX | Clogged Air Filter. |
| AB00KE | Charging Voltage Is Too Low. |
| AB00KE | Ab00Ke Charging Voltage Too Low Or Missing. |
| B @ BAZG, | Low Oil Pressure. |
| B @ BAZK | The Oil Level Is Too Low. |
| B @ BCNS | Engine Coolant Overheating. |
| B @ BCZK | Coolant Level Too Low. |
| B @ HANS | Hydraulic Oil From Overheating. |
| B @ the HANS | The Hydraulic Oil From Overheating. |
| B BCZK | The Coolant Level Is Too Low |
| CA111 | Internal Engine Controller Malfunction. |
| CA111 | The Engine Controller Internal Fault. |
| CA115 | Engine Crankshaft Speed Sensor And Speed Sensor Malfunction. |
| CA115 | The Engine Speed Sensor And Backup Speed Sensor Failure. |
| CA122 | The Feedback Voltage Of The Intake Air Pressure Sensor Is Too High. |
| CA122 | The Intake Air Pressure Sensor Feedback Voltage Is Too High Failure. |
| CA123 | Intake Air Pressure Sensor Feedback Voltage Is Too Low. |
| CA123 | The Intake Air Pressure Sensor Feedback Voltage Is Too Low Failure. |
| CA131 | The Throttle Plate Sensor Feedback Voltage Failure. |
| CA131 | Throttle Sensor Feedback Sensor Failure. |
| CA132 | Hrottle Plate Sensor Feedback Voltage And Low Failure. |
| CA132 | Throttle Sensor Feedback Pressure And Low Failure. |
| CA144 | Coolant Temperature High Temperature Sensor Feedback Fault 145, Coolant Temperature Sensor Feedback |
| CA144 | High Coolant Temperature Sensor Feedback Voltage Fault 145, The Coolant Temperature Sensor Feedback |
| CA153 | Intake Air Temperature Sensor Feedback Voltage Is Too High Failure; |
| CA153 | Intake Air Temperature Sensor Feedback Voltage Is Too High; |
| CA154 | Intake Air Temperature Sensor Feedback Voltage Is Too Low Failure; |
| CA154 | Intake Air Temperature Sensor Feedback Voltage Is Too Low; |
| CA155 | Intake Air Temperature Too High (Excess); |
| CA155 | The Intake Air Temperature Is Too High (Over Limit); |
| CA187 | Sensor Power Supply Voltage Is Too High Failure; |
| CA187 | Sensor Supply Voltage Is Too High; |
| CA2185 | The Power Supply Voltage Of The Throttle Valve Is Too High; |
| CA2185 | The Throttle Plate Supply Voltage Is Too High Failure; |
| CA2186 | The Throttle Plate Supply Voltage Is Too Low Failure; |
| CA2186 | Throttle Power Voltage Too Low; |
| CA221 | The Ambient Pressure Sensor Feedback Voltage Is Too High Failure; |
| CA221 | The Ambient Pressure Sensor Feedback Voltage Is Too High; |
| CA222 | The Ambient Pressure Sensor Feedback Voltage Is Too Low Failure; |
| CA222 | The Ambient Pressure Sensor Feedback Voltage Is Too Low; |
| CA2249 | The Common Rail Pressure Is Too Low Failure; |
| CA2249 | The Total Manifold Pressure Is Too Low; |
| CA227 | Sensor Power Supply Voltage Is Too High Failure; |
| CA227 | Sensor Supply Voltage Is Too High; |
| CA2311 | Imv, Solenoid Failure; |
| CA2311 | Imv, Solenoid Valve Failure; |
| CA234 | Engine Overspeed; |
| CA234 | Engine Speeding; |
| CA238 | Supply Voltage From Speed Sensor Failure; |
| CA238 | The Power Supply Voltage Of The Speed Sensor Failure; |
| CA2555 | Preheat Suction Too High Voltage; |
| CA2555 | Preheat The Intake Is Too High Voltage Fault; |
| CA2556 | Preheat The Intake Low Voltage Fault; |
| CA2556 | Pre-Open The Low Voltage Fault In The Input; |
| CA271 | Imv / Pcv1 Short Circuit; |
| CA271 | Imv/Pcv1 Short Circuit; |
| CA272 | Imv / Pcv1; |
| CA272 | Imv/Pcv1 Circuit; |
| CA322 | Injector Open Circuit, Short Circuit; |
| CA322 | The Nozzle An Open Circuit, Short Circuit Fault; |
| CA323 | Injector, Open Circuit, Short Circuit Failure; |
| CA323 | Nozzle, Open Circuit, Short Circuit Fault; |
| CA324 | Injector, Open Circuit, Short Circuit; |
| CA324 | Nozzle, Open Circuit, Short Circuit Fault; |
| CA325 | Injector, Open Circuit, Short Circuit; Ca435, Engine Oil Pressure Switch Failure; |
| CA325 | Nozzle, Open Circuit, Short Circuit Fault; |
| CA331 | Nozzle Open Circuit, Short Circuit Fault; |
| CA331 | The Nozzle Open Circuit, Short Circuit Fault; |
| CA332 | Injector, Open Circuit, Short Circuit Fault; |
| CA332 | Nozzle, Open Circuit, Short Circuit Fault; |
| CA342 | Correction Code Is Incorrect; |
| CA342 | The Correction Code Is Not Correct; |
| CA351 | Drive Circuit Failure; |
| CA351 | Jet Drive Circuit Failure; |
| CA352 | Sensor Supply Voltage Too Low; |
| CA352 | The Sensor Supply Voltage Is Too Low Failure; |
| CA386 | Sensor Supply Voltage Too High; |
| CA386 | The Sensor Supply Voltage Is Too High Failure; |
| CA428 | Fuel Moisture Sensor Feedback Voltage Is Too High Failure; |
| CA428 | The Feedback Voltage Of The Fuel Moisture Sensor Is Too High; |
| CA429 | The Feedback Voltage Of The Fuel Moisture Sensor Is Too Low; |
| CA429 | The Fuel Moisture Sensor Feedback Voltage Is Too Low Failure; |
| CA435 | Engine Oil Pressure Switch Failure; |
| CA441 | Battery Voltage Too Low; |
| CA441 | The Battery Voltage Is Too Low Failure; |
| CA442 | Battery Voltage Too High; |
| CA442 | The Battery Voltage Is Too High Failure; |
| CA449 | The Common Rail Pressure Is Too High Failure; |
| CA449 | The Total Pressure In The Reservoir Is Too High; |
| CA451 | The Common Rail Pressure Sensor Feedback Value Is Too High Failure; |
| CA451 | The Common Rail Pressure Sensor Feedback Value Is Too Large; |
| CA452 | Common Rail Pressure Sensor Feedback Is Too Low; |
| CA452 | The Common Rail Pressure Sensor Feedback Value Is Too Low Failure; |
| CA488 | Intake Air Temperature Too High (Reduced Torque); |
| CA488 | The Intake Air Temperature Is Too High (Torque Decrease); |
| CA553 | The Common Rail Pressure Is Too High Failure; |
| CA553 | The Total Pressure In The Manifold Is Too High; |
| CA559 | The Common Rail Pressure Is Too Low Failure; |
| CA559 | The Total Pressure In The Manifold Is Too Low; |
| CA633 | Data Transfer To Suspend Failure; |
| CA633 | The Data Transmission To Suspend Failure; |
| CA689 | Engine Crankshaft Speed Sensor Malfunction; |
| CA689 | The Engine Speed Sensor Fault; |
| CA731 | Engine Speed Sensor Signal Phase Failure; |
| CA731 | Spare Engine Speed Sensor Signal Phase Failure; |
| CA757 | All Data Is Lost; |
| CA757 | All Data Lost; |
| CA778 | Spare Engine Sensor Failure; |
| CA778 | Spare Engine Speed Sensor Fault; |
| D19JKZ | Elimination Of Code Personalization; |
| D19JKZ | Personalized Code Conversion Exception; |
| D862KA | Gps Antenna Circuit; |
| D862KA | D862Ka Gps Antenna Diagram; |
| DA22KK | Pump Solenoid Supply Voltage Too Low; |
| DA22KK | Da22Kk Pump Solenoid Valve Power Supply Voltage Is Too Low Failure; |
| DA25KP | Da25Kp 5V Sensor Supply Abnormalities; |
| DA25KP | Da25Kp Sensor Supply Failure 5V; |
| DA29KQ | Abnormal Mode Selection; |
| DA29KQ | Selection Of Abnormal Mode; |
| DA2RMC | Can Open (Display); |
| DA2RMC | Can Open Circuit (Display); |
| DGH2KB | Hydraulic Oil Temperature Sensor Short Circuit; |
| DHPAMA | Before The Pump Pressure Sensor Is Abnormal; |
| DHPBMA | After The Pump Pressure Sensor Is Abnormal; |
| DHS3MA | Tick To Recover Ppc Abnormal Pressure Sensor; |
| DHS3MA | Tick To Restore An Abnormal Pressure Sensor Ppc; |
| DHS4MA | Ucket Involved In Ppc Abnormal Pressure Sensor; |
| DHS4MA | Ucket Used In An Abnormal Pressure Sensor Ppc; |
| DHS8MA | Oom Enhance Ppc Abnormal Pressure Sensor; |
| DHS8MA | The Boom Amplifies The Abnormal Pressure Sensor Ppc |
| DHSAMA | Turn Right, The Ppc Pressure Sensor Is Abnormal; |
| DHSAMA | Turn To The Right Ppc Pressure Sensor Is Abnormal; |
| DHSBMA | Abnormal Left Turn Of The Pressure Sensor Ppc; |
| DHSBMA | Abnormal Left Turn Ppc Pressure Sensor; |
| DHSDMA | Ucket To Open The Ppc Abnormal Pressure Sensor; |
| DHSDMA | Or Opening An Abnormal Pressure Sensor Ppc; |
| DHX1MA | Abnormal Load Sensor; |
| DW43KA | Running High-Voltage Circuit Of The Electromagnetic Valve Of The Converter; |
| DW43KA | Walking High And Low Speed Converter Solenoid Valve Circuit; |
| DW43KB | Short And Low Solenoid Solenoid Valve Short Circuit; |
| DW43KB | Walking High And Low Speed Conversion Solenoid Valve Short Circuit; |
| DW45KA | Otation To Keep The Solenoid Valve Open Circuit; |
| DW45KA | Otation To Maintain An Open Solenoid Circuit; |
| DW45KB | Otation To Keep The Solenoid Valve Short Circuit; |
| DW45KB | Urn To Ensure A Short Circuit Of The Solenoid Valve; |
| DW91KA | Two Overflow Solenoid Valve Circuit; |
| DW91KA | Two Overflow Solenoid Valve Circuits; |
| DW91KB | Convergence Of The Short Circuit Of The Electromagnetic Valve; |
| DW91KB | Alk Convergence Of Short-Circuit Of The Solenoid Valve; |
| DWA2KA | Spare Solenoid Valve Circuit; |
| DWA2KB | Short Circuit Of The Spare Solenoid Valve; |
| DWA2KB | Spare Solenoid Valve Short Circuit; |
| DWK0KA | Two Overflow Solenoid Valve Circuit; |
| DWK0KA | Two Overflow Solenoid Valve Circuits; |
| DWK0KB | Two Overflow Solenoid Valve Short Circuit; |
| DWK0KB | Two Short-Circuit Overflow Solenoid Valve; |
| DXA8KA | Ormer Pump Pc-Epc Solenoid Valve Circuit; |
| DXA8KA | Ormer Pump Pc-Epc Solenoid Valve; |
| DXA8KB | Ormer Pump Pc-Epc Short Circuit Of The Solenoid Valve; |
| DXA8KB | Ormer Pump Pc-Epc Solenoid Valve Short Circuit; |
| DXA9KA | After The Pc-Epc Solenoid Valve Circuit; |
| DXA9KA | After The Pump Pc-Epc Solenoid Valve Circuit; |
| DXA9KB | After A Short Circuit Of The Pc-Epc Pump Solenoid Valve; |
| DXA9KB | After The Pump Pc-Epc Solenoid Valve Short Circuit; |
| DXE0KA | Ls-Epc Solenoid Valve Circuit; |
| DXE0KA | The Ls-Epc Solenoid Valve Circuit; |
| DXE0KB | Ls-Epc Solenoid Valve Short Circuit; |
| DXE0KB | Dxe0Kb, The Ls-Epc Solenoid Valve Short Circuit; |
| DXE4KA | Emergency Epc Circuit Breaker; |
| DXE4KA | Epc Safety Switch; |
| DXE4KB | Epc Fault Short; |
| DXE4KB | Emergency Epc Short Circuit; |
| DXE5KA | Pump Confluence / Shunt The Main Solenoid Valve Open Circuit; |
| DXE5KA | Pump Starts / Shunts An Open Circuit Of The Main Solenoid Valve; |
| DXE5KB | Merging Or Disabling The Main Short Circuit Of The Solenoid Valve; |
| DXE5KB | Pump Confluence / Diversion Of The Main Solenoid Valve Short Circuit; |
| DXE6KA | Low Voltage Release / Shunt Of The Ls Solenoid Valve; |
| DXE6KA | Pump Confluence / Shunt Ls Electromagnetic Valve Open Circuit; |
| DXE6KB | Fusion / Shunting Ls Short Circuit Of The Solenoid Valve; |
| DXE6KB | Pump Confluence / Shunt Ls Electromagnetic Valve Short Circuit; |
| DY20KA | Is Not Working Properly. , Exclusion Of Parking Dy20Ma; |
| DY20KA | Wiper Not Working Properly. , Dy20Ma Wiper Parking Exception; |
| DY2CKA | Engine Engine; |
| DY2CKA | Washers Motor Circuit; |
| DY2CKB | Motor Shorting Washers. |
| DY2CKB | Washers Motor Short Circuit. |
| E02 | Pc-The Epc System |
| E03 | Swing Parking Brake System |
| E10 | The Engine Controller Power Failure, The Engine Control Drive System Circuit Malfunction (This Engine Stall; |
| E11 | The Engine Control System Failure (Decrease Of Output Power, In Order To Protect The Engine); |
| E14 | The Feedback System Abnormalities; |
| E15 | Engine Sensors (Temperature, Fuel Pressure, Oil Pressure) Fault; |
| EOE | A Network Failure. |
