Geoty company established in 2012 mainly provides machinery engine parts and diesel engine assembly, especially for excavators, loaders and forklifts, our products almost covers all ranges of machinery engines.
Komatsu excavator old model code table PC (-8) model machine fault code
Fault code [989L00] Engine controller lock warning 1
Fault code [989M00] Engine controller lock warning 2
Fault code [989N00] Engine controller lock warning 3
Fault code [AA10NX] Air filter clogged
Fault code [AB00KE] Charging voltage is low
Fault code [B@BAZG] Low oil pressure
Fault code [B@BAZK] Engine oil level is low
Fault code [B@BCNS] Engine cooling water is overheated
Fault code [B@BCZK] Engine cooling water level is low
Fault code [B@HANS] Hydraulic oil overheating
Fault code [CA111] EMC critical internal fault
Fault code [CA115] Engine Ne and Bkup speed sensor failure
Fault code [CA122] High pressure fault of inflation pressure sensor
Fault code [CA123] Inflation pressure sensor low pressure fault
Fault code [CA131] Throttle sensor high voltage fault
Fault code [CA132] Throttle sensor low voltage fault
Fault code [CA144] Coolant temperature sensor high voltage fault
Fault code [CA145] Coolant temperature sensor low pressure fault
Fault code [CA153] Charging temperature sensor high pressure fault
Fault code [CA154] Charging temperature sensor low pressure fault
Fault code [CA155] The charging temperature drops rapidly
Fault code [CA187] Sensor power supply 2 low voltage fault
Fault code [CA221] Environmental pressure sensor high pressure fault
Fault code [CA222] Environmental pressure sensor low pressure fault
Fault code [CA227] Sensor power supply 2 high voltage fault
Fault code [CA234] Engine over speed
Fault code [CA238] Ne speed sensor power supply voltage failure
Fault code [CA271] IMV/PCV1 short circuit fault
Fault code [CA272] IMV/PCV1 open circuit fault
Fault code [CA322] Injector #1 (L#1) open circuit/short circuit fault
Fault code [CA323] Injector #5 (L#5) open circuit/short circuit fault
Fault code [CA324] Injector #3 (L#3) open circuit/short circuit fault
Fault code [CA325] Injector #6 (L#6) open circuit/short circuit fault
Fault code [CA325] Injector #2 (L#2) open circuit/short circuit fault
Fault code [CA325] Injector #4 (L#4) open circuit/short circuit fault
Troubleshooting with fault codes (display codes), Part 2
Fault code [CA342] Calibration code is incompatible
Fault code [CA351] Fuel injector drive circuit fault
Fault code [CA352] Sensor power supply 1 low voltage fault
Fault code [CA386] Sensor power supply 1 voltage high fault
Fault code [CA428] Fuel water sensor high voltage fault
Fault code [CA429] Fuel water sensor low voltage fault
Fault code [CA435] Oil pressure switch failure
Fault code [CA441] battery low voltage fault
Fault code [CA442] High battery voltage fault
Fault code [CA449] Extremely high oil tank pressure fault
Fault code [CA451] Oil tank pressure sensor high voltage fault
Fault code [CA452] Oil tank pressure sensor low voltage fault
Fault code [CA488] The charging temperature is high and the torque is reduced.
Fault code [CA553] High oil tank pressure fault
Fault code [CA559] low oil tank pressure fault
Fault code [CA689] Engine Ne speed sensor failure
Fault code [CA731] Engine Bkup speed sensor phase failure
Fault code [CA757] All continuous data loss fault
Fault code [CA778] Engine Bkup speed sensor failure
Fault code [CA1633] KOMNET data link timeout fault
Fault code [CA2185] Throttle sensor power supply voltage high fault
Fault code [CA2186] Throttle sensor power supply voltage low fault
Fault code [CA2249] Oil tank pressure extremely low fault
Fault code [CA2311] IMV solenoid coil failure
Fault code [CA2555] Grill heater relay high voltage fault
Fault code [CA2556] Grill heater relay low voltage fault
Fault code [D19JKZ] Personnel code relay abnormality
Fault code [D862KA] GPS antenna is broken.
Fault code [DA22KK] Pump solenoid coil power supply voltage is low.
Fault code [DA25KP] 5V sensor 1 power supply voltage abnormality
Fault code [DA29KQ] Abnormal model selection
Diagnose faults based on fault codes (code display)
Fault code [DA2RMC] CAN open circuit (pump controller detects
Fault code [DAFGMC] GPS module fault
Fault code [DAFRMC] CAN open circuit (pump controller detection)
Fault code [DGH2KB] Hydraulic oil temperature sensor short circuit
Fault code [DHPAMA]F Pump pressure sensor abnormality
Fault code [DHPBMA]R Pump pressure sensor abnormality
Fault code [DHS3MA] The stick is retracted and the PPC pressure sensor is abnormal.
Fault code [DHS4MA] Bucket excavation PPC pressure sensor abnormality
Fault code [DHS8MA] Boom lifting PPC pressure sensor abnormality
Fault code [DHSAMA] Right rotation PPC pressure sensor abnormality
Fault code [DHMA] Left rotation PPC pressure sensor abnormality
Fault code [DHSDMA] Bucket unloading PPC pressure sensor abnormality
Fault code [DHX1MA] Overload sensor abnormality (simulation)
Fault code [DW43KA] Travel speed solenoid coil is open circuit
Fault code [DW43KB] Travel speed solenoid coil short circuit
Fault code [DW45KA] Swing brake solenoid coil is open circuit
Fault code [DW45KB] Swing brake solenoid coil short circuit
Fault code [DW91KA] Walking connected electromagnetic coil is open circuit
Fault code [DW91KB] Walking connection electromagnetic coil short circuit
Fault code [DWA2KA] Backup solenoid coil is open circuit
Fault code [DWA2KB] Backup solenoid coil short circuit
Fault code [DWK0KA] Level 2 overflow solenoid coil is open circuit
Fault code [DWK0KB] Level 2 overflow solenoid coil short circuit
Diagnose faults based on fault codes (code display)
Fault code [DXA8KA] PC-EPC (F) electromagnetic coil system open circuit
Fault code [DXA8KB] PC-EPC (F) electromagnetic coil system open circuit
Fault code [DXA9KA] PC-EPC (R) electromagnetic coil system open circuit
Fault code [DXA9KB] PC-EPC(R) electromagnetic coil system short circuit
Fault code [DXE0KA] LS-EPC solenoid system open circuit
Fault code [DXE0KB] LS-EPC solenoid coil short circuit
Fault code [DXE4KA] Standby current EPC solenoid coil open circuit
Fault code [DXE4KB] Standby current EPC solenoid coil short circuit
Fault code [DXE5KA] Merging-diverging main solenoid coil is open circuit
Fault code [DXE5KB] Merging-shunting main solenoid coil short circuit
Fault code [DXE6KA] Combined-shunt LS electromagnetic coil open circuit
Fault code [DXE6KB] Combined-shunt LS solenoid coil short circuit
Fault code [DY20KA] Wiper working abnormally
Fault code [DY20MA] Wiper stops abnormally
Fault code [DY2CKA] Washer drive system open circuit
Fault code [DY2CKB] Scrubber drive system short circuit
Fault code [DY2DKB] Wiper drive system (forward) short circuit
Fault code [DY2EKB] Wiper drive system (reverse) short circuit
Electrical system fault diagnosis (E mode)
Before troubleshooting electrical systems
Troubleshooting table information
E-1 When the start switch is turned to the ON position, there is no display on the machine monitor
E-2 When the starting switch is turned to the ON position (before starting the engine), the basic inspection items flash
E-3 The engine does not start (the engine does not rotate)
E-4 preheater does not work
E-5 Automatic preheating system does not work (in cold season)
E-6 All working devices, slewing and traveling mechanisms do not move or cannot be locked
E-7 Attention light comes on when the engine is running
E-8 The emergency stop item light comes on when the engine is running.
E-9 Engine coolant temperature gauge displays abnormally
E-10 Hydraulic oil temperature gauge displays abnormally
E-11 The fuel level gauge displays abnormally
E-12 The display content of the machine monitor is different from that of the applicable machine.
E-13 Machine monitor does not display some items
E-14 function switch does not work.
E-15 Automatic speed reducer does not work properly
E-16 Working mode does not change
E-17 Walking speed does not change
E-18 The alarm buzzer cannot stop
E-19 Windshield wipers and window washer not working
E-20 Maximum power function does not work properly
E-21 The swing holding brake does not work properly.
E-22 The walking alarm does not sound or stops sounding
E-23 Air conditioner is not working properly (including air conditioner abnormality record)
E-24 When the start switch is in the OFF position, the hour meter does not display
E-25 Machine monitor cannot be set while in service mode
E-26 The monitoring function is abnormal and the joystick control signal is displayed.
E-27 KOMTRAX system not working properly
Troubleshooting of hydraulic and mechanical systems (H mode)
H-1 The speed or power of the entire working device, rotation, and travel is low
H-2 engine speed drops extremely quickly or engine stalls
H-3 working device, rotation, and traveling system do not work
H-4 Abnormal sounds occur around the hydraulic pump
H-5 automatic reducer does not work
H-6 Fine control performance or low response
H-7 Boom speed or power is low
H-8 Stick has low speed or power
H-9 Bucket speed or power is low
H-10 Working equipment does not move alone
H-11 working device has large hydraulic drift
H-12 The time lag of the working device is large
H-13 When parts of the work equipment are individually flooded, other parts of the work equipment move
H-14 Maximum power function does not work
H-15 In the composite operation of the work device, the speed of the component with a large load is low
H-16 When the machine rotates and lifts the boom at the same time, the boom lifting speed is low
H-17 When the machine rotates and walks at the same time, the walking speed is greatly reduced
H-18 Deviation during machine travel
H-19 low walking speed
H-20 The machine has poor steering or low steering force
H-21 Walking speed remains unchanged or walking speed is low/high
H-22 walking system does not move (only one side)
H-23 The upper rotating platform does not rotate
H-24 Rotation acceleration or low rotation speed
H-25 When the upper rotating platform stops rotating, it rotates too much
H-26 When the upper rotating platform stops rotating, a large vibration occurs
H-27 When the upper rotating platform stops rotating, it makes a loud sound
H-28 has large hydraulic drift in rotation
H-30 cannot control the flow in the accessory oil circuit
Engine fault diagnosis (S mode)
S-1 poor starting performance
S-2 engine cannot start
S-3 engine accelerates unevenly
S-4 engine shutdown during operation
S-5 engine does not rotate smoothly
S-6 engine output is insufficient (or insufficient power)
S-7 exhaust smoke is black (incomplete combustion)
S-8 Excessive fuel consumption (or exhaust smoke is blue)
S-9 oil contaminates quickly
S-10 Excessive fuel consumption
S-11 There is oil in the coolant (or the coolant sprays out or the coolant level drops)
S-12 Oil pressure drops
S-13 Engine oil level rises (coolant/fuel enters)
S-14 Coolant temperature becomes too high (overheating)
S-15 makes unusual noises
S-16 Excessive vibration
PC (8MO) eight-MO machine fault code table
Fault code [879AKA] A/C internal sensor open circuit
Fault code [879AKB] A/C internal sensor short circuit
Fault code [879BKA] A/C external sensor open circuit
Fault code [879BKB] A/C external sensor short circuit
Fault code [879CKA] Ventilation sensor open circuit
Fault code [879CKB] Ventilation sensor short circuit
Fault code [879DKZ] Sunlight sensor open or short circuit
Fault code [879EMC] Abnormal ventilation damper
Fault code [879FMC] Air mixture damper abnormality
Fault code [879GKX] Refrigerant abnormality
Fault code [989L00] Engine controller lock warning 1
Fault code [989M00] Engine controller lock warning 2
Fault code [989N00] Engine controller lock warning 3
Fault code [AA10NX] Air filter clogged
Fault code [AB00KE] Charging voltage is low
Fault code [B@BAZG] Low oil pressure
Fault code [B@BAZK] Engine oil level is low
Fault code [B@BCNS] Engine cooling water is overheated
Fault code [B@BCZK] Radiator coolant level is low
Fault code [B@HANS] Hydraulic oil overheating
Fault code [CA111] ECM critical internal fault
Fault code [CA115] Engine Ne and Bkup speed sensor failure
Fault code [CA122] Boost pressure sensor high pressure fault
Fault code [CA123] Boost pressure sensor low pressure fault
Fault code [CA131] Throttle sensor high voltage fault
Fault code [CA132] Throttle sensor low voltage fault
Fault code [CA144] Coolant temperature sensor high voltage fault
Fault code [CA145] Coolant temperature sensor low pressure fault
Fault code [CA153] Supercharger temperature sensor high voltage fault
Fault code [CA154] Boost temperature