Komatsu Fault Codes list

Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, Komatsu Fault Codes list, plus they are familiar with equipment from a variety of manufacturers.

Komatsu Ltd. or Komatsu is a Japanese multinational corporation that manufactures construction, mining, forestry and military equipment, as well as diesel engines and industrial equipment like press machines, lasers and thermoelectric generators. Its headquarters are in Minato, Tokyo, Japan. The corporation was named after the city of Komatsu, Ishikawa Prefecture, where the company was founded in 1921. Worldwide, the Komatsu Group consists of Komatsu Ltd. and 258 other companies (215 consolidated subsidiaries and 42 companies accounted for by the equity method).

Komatsu Fault Codes

E02 PC – EPC system;
E03, parking brake system;
E10, engine controller power failure, engine management system malfunction
E11, engine control failure (reduction of output power to protect the engine);
E14 – failure of the feedback system;
E15, engine sensor malfunction (temperature, fuel pressure, oil pressure);

EOE network failure.
989L00 Error code: engine controller lockout warning (mode 1).
989M00, motor controller for blocking the warning (mode 2).
989N00, motor controller for blocking the warning (mode 3).
AA10NX Clogged air filter.
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.
CA111, internal engine controller malfunction.
CA115, engine crankshaft speed sensor and speed sensor malfunction.
CA122, the feedback voltage of the intake air pressure sensor is too high.
CA123, intake air pressure sensor feedback voltage is too low.
CA131, throttle sensor feedback sensor failure.
CA132, Throttle Sensor Feedback Pressure and Low Failure.
CA144, coolant temperature high temperature sensor feedback fault 145, coolant temperature sensor feedback voltage too low or short circuit;
CA153, intake air temperature sensor feedback voltage is too high;
CA154, intake air temperature sensor feedback voltage is too low;
CA155, intake air temperature too high (excess);
CA187, sensor supply voltage is too high;
CA221, the ambient pressure sensor feedback voltage is too high;
CA222, the ambient pressure sensor feedback voltage is too low;
CA227, sensor supply voltage is too high;
CA234, engine speeding;
CA238, supply voltage from speed sensor failure;
CA271, IMV / PCV1 short circuit;
CA272, IMV / PCV1;
CA322, injector open circuit, short circuit;
CA323, injector, open circuit, short circuit failure;
CA324, injector, open circuit, short circuit;
CA325, injector, open circuit, short circuit; CA435, engine oil pressure switch failure;
CA331, nozzle open circuit, short circuit fault;
CA332, injector, open circuit, short circuit fault;
CA342, correction code is incorrect;
CA351, drive circuit failure;
CA352, sensor supply voltage too low;
CA386, sensor supply voltage too high;
CA428, the feedback voltage of the fuel moisture sensor is too high;
CA429, the feedback voltage of the fuel moisture sensor is too low;
CA441, battery voltage too low;
CA442, battery voltage too high;
CA449, the total pressure in the reservoir is too high;
CA451, the common rail pressure sensor feedback value is too large;
CA452, Common Rail Pressure Sensor Feedback is too low;
CA488, intake air temperature too high (reduced torque);
CA553, the total pressure in the manifold is too high;
CA559, the total pressure in the manifold is too low;
CA689, engine crankshaft speed sensor malfunction;
CA731, engine speed sensor signal phase failure;
CA757, all data lost;
CA778, spare engine sensor failure;
CA633, data transfer to suspend failure;
CA2185, the power supply voltage of the throttle valve is too high;
CA2186, Throttle Power Voltage Too Low;
CA2249, the total manifold pressure is too low;
CA2311, IMV, solenoid failure;
CA2555, preheat suction too high voltage;
CA2556, pre-open the low voltage fault in the input;
D19JKZ Elimination of code personalization;
D862KA GPS Antenna Diagram;
DA22KK Pump solenoid supply voltage too low;
DA25KP sensor supply failure 5V;
DA29KQ, selection of abnormal mode;
DA2RMC, CAN open (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 Stick to restore an abnormal pressure sensor PPC;
DHS4MA bucket used in an abnormal pressure sensor PPC;
The DHS8MA boom amplifies the abnormal pressure sensor PPC;
DHSAMA, turn right, the PPC pressure sensor is abnormal;
DHSBMA, abnormal left turn of the pressure sensor PPC;
DHSDMA for opening an abnormal pressure sensor PPC;
DHX1MA, abnormal load sensor;
DW43KA, running high-voltage circuit of the electromagnetic valve of the converter;
DW43KB, short and low solenoid solenoid valve short circuit;
DW45KA Rotation to maintain an open solenoid circuit;
DW45KB Turn to ensure a short circuit of the solenoid valve;
DW91KA, two overflow solenoid valve circuits;
DW91KB – convergence of the short circuit of the electromagnetic valve;
DWA2KA, spare solenoid valve circuit;
DWA2KB, short circuit of the spare solenoid valve;
DWK0KA, two overflow solenoid valve circuits;
DWK0KB, two short-circuit overflow solenoid valve;
DXA8KA former pump PC-EPC solenoid valve;
DXA8KB former pump PC-EPC short circuit of the solenoid valve;
DXA9KA, after the PC-EPC solenoid valve circuit;
DXA9KB, after a short circuit of the PC-EPC pump solenoid valve;
DXE0KA, LS-EPC solenoid valve circuit;
DXE0KB, LS-EPC solenoid valve short circuit;
DXE4KA, EPC safety switch;
DXE4KB EPC Fault Short;
DXE5KA Pump starts / shunts an open circuit of the main solenoid valve;
DXE5KB merging or disabling the main short circuit of the solenoid valve;
DXE6KA low voltage release / shunt of the LS solenoid valve;
DXE6KB fusion / shunting LS short circuit of the solenoid valve;
DY20KA is not working properly. , Exclusion of parking DY20MA;
DY2CKA Engine engine;
DY2CKB motor shorting washers.

Komatsu PC400-7, 400LC-7 Excavator Fault Codes List

Diagnosing Faults When Displaying Error Codes for PC400-7, 400LC-7 Electrical Equipment

Error code electrical equipment [E112] (Short circuit in the circuit of the normal rotation of the electric wiper) 20-306
Electrical equipment error code [E113] (Short circuit in the reverse rotation of the electric wiper drive) 20-308
Electrical equipment error code [E114] (Short circuit in the circuit of the electric windshield washer) 20-310
Electrical equipment error code [E115] (Violations in the movement of the windscreen wiper) 20-312
Electrical equipment error code [Е116] (Malfunction of the wiper retractor mechanism) 20-314
Electrical Equipment Error Code [E201] (Short Circuit in Solenoid Blocking Solenoid Valve) 20-322
Electrical equipment error code [Е203] (Short circuit in the solenoid valve circuit of the platform turning brake) 20-324
Electrical equipment error code [Е204] (Short circuit in the circuit of the solenoid valve of the flow divider) 20-326
Electrical equipment error code [Е205] (Short circuit in a two-stage electromagnetic unloading valve) 20-327
Error code electrical equipment [E206] (Short circuit in the circuit of the solenoid valve switching speed range of movement) 20-328
Electrical equipment error code [Е211] (Open circuit of the electromagnetic valve blocking movement) 20-329
Electrical equipment error code [Е213] (Open circuit in the solenoid valve of the platform rotation brake) 20-330
Electrical equipment error code [Е214] (Open circuit in the solenoid valve of the flow divider) 20-332
Electrical equipment error code [Е215] (Open circuit in a two-stage electromagnetic unloading valve) 20-333
Electrical equipment error code [Е216] (Open circuit in the solenoid valve for switching the speed range of movement) 20-334
Electrical equipment error code [E217] (Malfunction in the model code entry scheme) 20-336
Electrical equipment error code [E218] (S-NET block open circuit) 20-338
Electrical equipment error code [Е222] (Short circuit in the solenoid LS-EPC) 20-340
Electrical equipment error code [Е223] (Open circuit in the solenoid LS-EPC) 20-341
Electrical Equipment Error Code [E224] (Front Pump Pressure Sensor Malfunction) 20-342
Electrical equipment error code [E225] (Malfunction of the rear pump pressure sensor) 20-344
Electrical equipment error code [E226] (Malfunction in pressure sensor power supply circuit) 20-346
Electrical equipment error code [E227] (Motor speed sensor malfunction) 20-348
Electrical equipment error code [Е228] (Short circuit in the circuit of the switching relay of the auxiliary equipment) 20-349
Electrical equipment error code [Е232] (Short circuit in solenoid circuit PC-EPC) 20-350
Electrical equipment error code [Е233] (Open circuit in the solenoid circuit PC-EPC) 20-352
Electrical equipment error code [Е238] (Open circuit in the auxiliary work equipment switching relay circuit) 20-354
Electrical equipment error code [Е245] (Short circuit in the EPC solenoid circuit regulating the flow of oil to the additional working equipment) 20-356
Electrical equipment error code [Е246] (Short circuit in the EPC solenoid circuit that regulates the flow of oil to the additional working equipment) 20-357
Electrical equipment error code [E247] (Malfunction of the pressure sensor PPC handle in the FOLDING mode) 20-358
Electrical equipment error code [E248] (Malfunction of the pressure sensor PPC bucket in the FOLDING mode) 20-360
Electrical equipment error code [E257] (Malfunction of the communication channel with the pump) 20-362
Electrical equipment error code [E315] (Short circuit in the output circuit of the battery relay) 20-364
Electrical equipment error code [Е91В] (Motor sensor Ne fault) 20-366
Electrical equipment error code [Е91С] (Motor sensor G malfunction) 20-367
Electrical equipment error code [Е920] (Error selecting engine type) 20-368
Electrical equipment error code [Е921] (Engine type mismatch) 20-370
Electrical equipment error code [Е931] (Error in the fuel control circuit) 20-372
Electrical equipment error code [Е934] (Malfunction in the engine coolant high temperature sensor circuit) 20-374
Electrical equipment error code [Е936] (Malfunction in the engine oil pressure switch circuit) 20-376
Electrical equipment error code [Е93С] (Malfunction in the charge pressure sensor circuit) 20-378
Electrical equipment error code [E93D] (Malfunction in the engine fuel temperature sensor circuit) 20-380
Electrical equipment error code [E953] (Malfunction in the communication channel with the engine) 20-382
Electrical equipment error code [E954] (Short circuit in the starting switch circuit) 20-384
Electrical equipment error code [Е955] (S-NET unit malfunction) 20-386
Error code electrical equipment [E956] (loss of engine power (1)) 20-388
Error code electrical equipment [E957] (loss of engine power (2)) 20-390
Electrical equipment error code [Е95А] (Error in the fuel injection regulator circuit) 20-392
Electrical equipment error code [Е96А] (Error in the engine coolant low temperature sensor circuit) 20-394
Electrical equipment error code [Е970] (Solenoid PCV1 overcurrent) 20-396
Electrical equipment error code [Е971] (Overcurrent of solenoid PCV2) 20-397
Electrical equipment error code [Е974] (Open circuit of the solenoid PCV1) 20-398
Electrical equipment error code [Е975] (Open circuit of the solenoid PCV2) 20-399
Electrical equipment error code [Е977] (Malfunction in the circuit of the pressure sensor of the injection high pressure fuel line) 20-400
Electrical equipment error code [Е979] (High pressure fuel injection line) 20-402
Electrical equipment error code [Е97А] (Unintended pressure in high pressure fuel supply line) 20-402
Electrical equipment error code [Е97В] (Low pressure in the injection fuel line) 20-403
Electrical equipment error code [E97С] (Excessively low pressure in the high pressure fuel injection line) 20-405
Electrical equipment error code [Е97D] (pressure in the high pressure fuel injection pipe is not adjustable) 20-405
Electrical equipment error code [Е980] (Motor controller malfunction) 20-406
Electrical equipment error code [Е981] (Open circuit of the fuel injector 1) 20-408
Electrical equipment error code [Е982] (Open circuit of the fuel injector 2) 20-409
Electrical equipment error code [Е983] (Open circuit of the fuel injector 3) 20-410
Electrical equipment error code [Е984] (Open circuit of the fuel injector 4) 20-411
Electrical equipment error code [Е985] (Open circuit of the fuel injector 5) 20-412
Error code of electrical equipment Е986 (Open circuit of the fuel injector 6) 20-413
Electrical equipment error code [Е98А] (Short circuit in fuel injector circuits 1 – 3) 20-414
Electrical equipment error code [Е98В] (Short circuit in the fuel injector 4 – 6 circuits) 20-416

Mechanical system fault code [A000N2] (Engine speed is below standard) 20-418
Mechanical system malfunction code [A000N1] (Engine speed is above standard) 20-418
Mechanical system malfunction code [AA10NX] (Clogged air cleaner) 20-420
Mechanical System DTC [AB00KE] (Low Voltage Charging) 20-422
Mechanical system fault code [B @ BAZG] (Low engine oil pressure) 20-424
Mechanical system fault code [B @ BAZK] (Low engine oil level) 20-426
Mechanical System DTC [B @ BCNS] (Engine Coolant Overheated) 20-427
Mechanical system fault code [B @ BCZK] (Low engine coolant level) 20-428 Mechanical system fault code [B @ HANS] (Hydraulic oil overheated) 20-429

Komatsu Forklift FB15-12 Error Codes List

Trouble Code (ALA)
ALA-5206 Starting switch transferred is ON, while the rise of the control lever is mounted in a position other than neutral.
ALA-5207 Starting switch transferred is ON, while the tilt control lever is set in a position other than neutral.
ALA-5208 Starting switch translated in the ON position at that time, as the lever 1 ATT working equipment control 1 is set in a position other than neutral.
ALA-5209 The starting switch is turned to ON, while the work equipment 2 control ATT lever 2 is set to a position other than neutral.
ALA-5210 The starting switch is turned to ON, while the control lever 3 ATT working equipment 3 is installed in a position other than neutral.
ALA-5229 * The automatic adjustment function of the horizontal tilt angle is switched off before or after at Proposition stop.
ALA-5255 * Improper management of the automatic functions adjust the horizontal angle.
1. Moving the tilt lever in anreverse direction.
2. Inclusion of buttons horizontal inclination, whereas the tilt control lever isXia horizontally.
3. The inclusion of the automatic function of the horizontal tilt, while installed on the car load.
* The machine is equipped with an automatic adjustment function of the horizontal angle.

ERR-3082 Malfunction of the communication channel between the controller (right) turn, and the controller (left) stroke.
ERR-3084 Malfunction of the communication channel between the controller (right) and stroke controller handling.
ERR-3281 Malfunction of the communication channel between the controller (right) turn, and the controller (left) stroke.
ERR-3284 Malfunction of the communication channel between the controller handling and controller (left) stroke.
ERR-5081 Malfunction of the communication channel between the controller (right) and stroke controller handling.
ERR-5082 Malfunction of the communication channel between the control (left) and a stroke controller for loading and unloading operations.
ERR-5085 Malfunction of the communication channel between the controller and the proportional solenoid valve controller handling.
ERR-5087 Malfunction of the communication channel between the controller and a power supply controller for loading and unloading operations.
ERR-5088 Malfunction of the communication channel between the controller handling and Controllers rum power source.
ERR-5211 Wrong signal lift control lever.
ERR-5212 Wrong signal tilt control lever.
ERR-5213 Wrong signal ATT1 work equipment control lever.
ERR-5214 Wrong signal ATT2 work equipment control lever.
ERR-5215 Wrong signal ATT3 work equipment control lever.
ERR-5216 Wrong signal lifting pressure sensor.
ERR-5217 Incorrect inclination angle sensor signal.
ERR-5218 Incorrect operation of the proportional solenoid valve lift.
ERR-5219 Incorrect operation of the proportional solenoid valve angle.
ERR-5220 Incorrect operation of the proportional solenoid valve ATT1 working equipment.
ERR-5221 Incorrect operation of the proportional solenoid valve ATT2 working equipment.
ERR-5222 Incorrect operation of the proportional solenoid valve ATT3 working equipment.
ERR-5292 Fault source proportional solenoid valve controller power.
ERR-5293 Incorrect operation of the controller proportional solenoid valve.
ERR-5294 Wrong signal sensor working machine.
ERR-5295 Incorrect operation of the controller proportional solenoid valve.
ERR-5296 Error communication process controller proportional solenoid valve.
ERR1 4-8110 Error process communication controller (right) turn.
ERR1 8-8110 Error communication controller process (left) turn.
ERR3 0-8110 Error communication process controller handling.
ERR3 4-8110 Error communication process controller handling.
ERR4 0-8110 Error communication process dashboard.
ERR1 4-8120 Transmission error / reception on CAN data bus controller (right) turn.
ERR1 8-8120 Transmission error / reception on CAN data bus controller (left) stroke.
ERR3 0-8120 Error data transmission / reception on CAN bus controller handling.
ERR3 4-8120 Error data transmission / reception on CAN bus controller proportional solenoid valve.
ERR4 0-8120 Error transmitting / receiving CAN bus data dashboard.
ERR1 4-8130 Malfunction of the communication channel between the CAN controller (right) turn and the dashboard.
ERR1 8-8130 Malfunction of the communication channel between the CAN controller (left) and move the instrument panel.
ERR3 0-8130 Malfunction of the communication channel between the CAN controller handling and instrument panel.
ERR3 4-8130 Fault CAN communication channel between the controller proportional electromagnetic valve stemPan and the instrument panel.
ERR1 4-8140 Incorrect data transmission on the CAN bus controller (right) turn.
ERR1 8-8140 Incorrect data transmission on the CAN bus controller (left) stroke.
ERR3 0-8140 Incorrect data transmission on the CAN bus controller handling.
ERR3 4-8140 Incorrect data transmission on the CAN bus controller proportional solenoid valve.
ERR4 0-8140 Incorrect data transmission via the CAN bus instrument panel.
ERR4 0-8314 Malfunction of the communication channel between the CAN controller (right) turn and the dashboard.
ERR4 0-8318 Malfunction of the communication channel between the CAN controller (left) and move the instrument panel.
ERR4 0-8330 Malfunction of the communication channel between the CAN controller handling and instrument panel.
ERR4 0-8334 Fault CAN communication channel between the controller proportional electromagnetic valve stem Pan and the instrument panel.
ERR4 0-8510 Fault CAN communication channel dashboard after the installation of the starting switch to ON.

DTC instrument panel (movement system controller)

ERR-300 Damage to the main contactor, blown fuse
ERR-300 Short circuit of the main contactor
ERR-ERR-300 320 Low voltage (battery voltage drop)
ALA- ALA-320 Warning of incorrect operation training
ERR-ERR-301 321 movement control module (short-circuit the upper and lower FET)
ERR-ERR-301 321 movement system controller (Short upper side)
ERR-ERR-301 321 movement system controller (Short lower side)
ERR-ERR-301 321 movement system controller (Damage phase conductors U)
ERR-301 ERR-3214 movement system controller (Damage phase conductor V)
ERR-ERR-301 321 movement system controller (Damage phase conductor W)
ERR-301 Defect fast it is charging circuit (capacitor charging circuit defect between P and N)
ALA- ALA-322 movement system controller (temperature increase)
ERR-302 ERR-3221 movement system controller (temperature is not correct)
ALA- ALA-323 Hydraulic movement (temperature increase)
ERR-303 ERR-3231 Hydraulic movement (temperature is not correct)
ERR-303 ERR-3230 Short-circuiting between the phases of movement of the hydro motor (Short load circuits).
ERR-ERR-305 325 temperature sensor fault movement system controller
ERR-305 ERR-3251 temperature sensor failure motor movement
ERR-ERR-305 325 Wrong sensor output current in the movement system (phase U, phase W)
ERR-ERR-305 325 Malfunction of the accelerator, the accelerator switch
ERR-305 Fault wheel angle potentiometer. (Measured angle is not correct)
ERR-ERR-305 325 motor speed sensor of movement (A phase output signal is not sootsponds to normal).
ERR-ERR-305 325 motor speed sensor movement (output of phase B is not sootsponds to normal).
ERR-306 Malfunction of front-reverse switch
ERR-306 Fault logic seating sensor element _a and _b seat sensor.
ERR-ERR-308 308 ERR-ERR-3281 328

Fault CAN communication channel. (Malfunction of the communication channel)

Fault code panel instrumentation (Controller handling)
Code The fault description
ERR-5004 Low voltage (battery voltage drop)
ALA-5005 Warning of incorrect operation training
ERR-5010 Controller handling (short-circuit the upper and lower FET)
ERR-5011 Controller handling (Short upper side)
ERR-5012 Controller handling (Short lower side)
ERR-5013 Controller handling (Damage phase conductors U)
ERR-5014 Controller handling (Damage phase conductor V)
ERR-5015 Controller handling (Damage phase conductor W)
ALA-5021 Controller handling (temperature increase)
ERR-5021 Controller handling (temperature is not correct)
ERR-5030 Short circuit of the pump motor phases (short circuit load circuits)
ALA-5031 Motor pump (temperature increase)
ERR-5031 Motor pump (temperature is not correct)
ERR-5040 Input external controller beyond the normative range
ERR-5050 Temperature Sensor Controller Fault handling
ERR-5051 Fault pump motor temperature sensor
ERR-5052 Wrong output current sensor signal to the handling system (phase U, phase W)
ERR-5055 Malfunction of the steering wheel angle sensor (measured angle is not correct)
ERR-5057 Fault pump motor rotation speed sensor
ERR-5081 Fault CAN communication channel (communication channel has failed)