Komatsu Fault Codes List and How to Decipher Them

Navigating the complex domain of machine diagnostics codes requires a blend of technological prowess and in-depth knowledge.

Komatsu’s equipment promises unwavering performance and offers intricate diagnostic mechanisms to preempt and address malfunctions.

So, when a Komatsu piece beeps a fault code, it signals more than just an error—it signals a robust diagnostic story. Let's dive into it.

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Demystifying Komatsu’s Diagnostic Codes

Every Komatsu machine embodies state-of-the-art engineering coupled with intuitive diagnostic ecosystems. These systems render fault codes as vital indicators, providing technicians with a profound insight into the machinery's core.

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Common Komatsu Fault Codes

E03: An alert pinpointing discrepancies in the safety lever system. Immediate inspection of the lever's connectivity and alignment is paramount.

E05: A flag indicating perturbations within the hydraulic system's controller. This could be indicative of intrinsic controller malfunctions or peripheral connectivity aberrations.

E10: Signifies potential disruptions within the vehicle controller. A meticulous examination of the interfacing points, followed by contemplation of controller replacement, is advocated.

E15: Signals a possible deviation in the rotation angle sensor's metrics. Ensuring the sensor's integrity and scrutinizing its interconnections is crucial.

E20: Isolates challenges associated with the hydraulic return filter. Depending on the fault's nature, a comprehensive filter cleansing or a complete overhaul might be warranted.

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Here Complete list of Komatsu fault codes:

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 to protect the engine);

E14: the feedback system abnormalities;

E15: engine sensors (temperature, fuel pressure, oil pressure) fault;

EOE: a network failure.

989L00: The fault code: the engine controller lock warning (mode 1).

989M00: the engine controller to lock warning (mode 2).

989N00: the engine controller to lock warning (mode 3).

AA10NX: air filter clogging.

ABOOKE: The charging voltage is too low.

B @ BAZG: low oil pressure.

B @ BAZK: the oil level is too low.

B @ BCNS: engine coolant overheating.

The @ B BCZK: the coolant level is too low.

B@ the HANS: the hydraulic oil from overheating.

CA111: the engine controller internal fault.

CA115: the engine speed sensor and backup speed sensor failure.

CA122: the intake air pressure sensor feedback voltage is too high failure.

CA123: the intake air pressure sensor feedback voltage is too low failure.

CA131: the throttle plate sensor feedback voltage failure.

CA132: throttle plate sensor feedback voltage and low failure.

CA144: high coolant temperature sensor feedback voltage fault 145, the coolant temperature sensor feedback voltage is too low failure;

CA153: intake air temperature sensor feedback voltage is too high failure;

CA154: intake air temperature sensor feedback voltage is too low failure;

CA155: the intake air temperature is too high (over the limit);

CA187: sensor power supply voltage is too high failure;

CA221: the ambient pressure sensor feedback voltage is too high failure;

CA222: the ambient pressure sensor feedback voltage is too low failure;

CA227: sensor power supply voltage is too high failure;

CA234: engine overspeed;

CA238: the power supply voltage of the speed sensor failure;

CA271: IMV/PCV1 short circuit;

CA272: IMV/PCV1 circuit;

CA322: the nozzle an open circuit, short circuit fault;

CA323: nozzle, open circuit, short circuit fault;

CA324: nozzle, open circuit, short circuit fault;

CA325: nozzle, open circuit, short circuit fault;

CA331: the nozzle open circuit, short circuit fault;

CA332: nozzle, open circuit, short circuit fault;

CA342: the correction code is not correct;

CA351: jet drive circuit failure;

CA352: the sensor supply voltage is too low failure;

CA386: the sensor supply voltage is too high failure;

CA428: fuel moisture sensor feedback voltage is too high failure;

CA429: the fuel moisture sensor feedback voltage is too low failure;

CA435: engine oil pressure switch failure;

CA441: the battery voltage is too low failure;

CA442: the battery voltage is too high failure;

CA449: the common rail pressure is too high failure;

CA451: the common rail pressure sensor feedback value is too high failure;

CA452: the common rail pressure sensor feedback value is too low failure;

CA488: the intake air temperature is too high (torque decrease);

CA553: the common rail pressure is too high failure;

CA559: the common rail pressure is too low failure;

CA689: the engine speed sensor fault;

CA731: spare engine speed sensor signal phase failure;

CA757: all data is lost;

CA778: spare engine speed sensor fault;

CA633: the data transmission to suspend failure;

CA2185: the throttle plate supply voltage is too high failure;

CA2186: the throttle plate supply voltage is too low failure;

CA2249: the common rail pressure is too low failure;

CA2311: IMV, solenoid valve failure;

CA2555: preheat the intake is too high voltage fault;

CA2556: preheat the intake low voltage fault;

D19JKZ: personalized code conversion exception;

D862KA: GPS antenna circuit;

DA22KK: pump solenoid valve power supply voltage is too low failure;

DA25KP: 5V sensor supply abnormalities;

DA29KQ: abnormal mode selection;

DA2RMC: 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: Stick to recover PPC abnormal pressure sensor,

DHS4MA: bucket involved in PPC abnormal pressure sensor,

DHS8MA: boom enhance PPC abnormal pressure sensor,

DHSAMA: turn to the right PPC pressure sensor is abnormal;

DHSBMA: abnormal left turn PPC pressure sensor,

DHSDMA: bucket to open the PPC abnormal pressure sensor,

DHX1MA: abnormal load sensor,

DW43KA: walking high and low-speed converter solenoid valve circuit;

DW43KB: walking high and low-speed conversion solenoid valve short circuit;

DW45KA: rotation to keep the solenoid valve open circuit;

DW45KB: rotation to keep the solenoid valve short circuit;

DW91KA: two overflow solenoid valve circuit;

DW91KB: walk convergence of short-circuit of the solenoid valve;

DWA2KA: spare solenoid valve circuit;

DWA2KB: spare solenoid valve short circuit;

DWKOKA: two overflow solenoid valve circuit;

DWKOKB: two overflow solenoid valve short circuit;

DXA8KA: former pump PC-EPC solenoid valve circuit;

DXA8KB: former pump PC-EPC solenoid valve short circuit;

DXA9KA: after the pump PC-EPC solenoid valve circuit;

DXA9KB: after the pump PC-EPC solenoid valve short circuit;

DXEOKA: the LS-EPC solenoid valve circuit;

DXEOKB: the LS-EPC solenoid valve short circuit;

DXE4KA: emergency EPC circuit breaker;

DXE4KB: emergency EPC short circuit;

DXE5KA: pump confluence/shunt the main solenoid valve open circuit;

DXE5KB: pump confluence/diversion of the main solenoid valve short circuit;

DXE6KA: pump confluence/shunt LS electromagnetic valve open circuit;

DXE6KB: pump confluence/shunt LS electromagnetic valve short circuit;

DY20KA: wiper not working properly.,

DY20MA: wiper parking exception;

DY2CKA: washers motor circuit;

DY2CKB: washers motor short circuit.

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Deciphering Komatsu Fault Codes

Komatsu's diagnostic nomenclature, while seemingly arcane, is grounded in logic:

The prefix "E" is emblematic of an Error.

The ensuing numerical digits serve as identifiers, zeroing in on the component or system undergoing duress.

For a nuanced interpretation, professionals are advised to consult the dedicated manual of their respective Komatsu model. Each model, given its unique engineering, may possess bespoke diagnostic identifiers.

Read also: Caterpillar Fault Codes List to know all the codes.

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Masterclass in Troubleshooting

The Manual: An Encyclopedia of Solutions: The machine's comprehensive guide is a reservoir of tailored insights and resolutions specific to each fault code.

Reassess Connectivity Metrics: Before delving into intricate diagnostics, ensure all connectivity endpoints are secure and devoid of corrosion.

Update to Innovate: Periodic software refreshes can remedy and preclude many operational challenges.

Engage with Connoisseurs: In scenarios of unresolved complexities, engaging a certified Komatsu savant is more than a recommendation—it's a requisite.

See also: Construction Equipment Maintenance Software 

In Retrospect

Komatsu's diagnostic codifications serve as a beacon, illuminating the intricate pathways of machinery health and performance.

Professionals can resolve extant issues and augment their Komatsu apparatus's operational longevity and prowess through a holistic comprehension and adept interpretation of these codes.

It's paramount to remember that while this exposition offers an expert perspective, the machine-specific manual remains an invaluable asset, and when confronted with perplexities, always enlist the acumen of seasoned experts.