HeavyEquipmentFix
Ask
Diagnostics

Hitachi Fault Codes List & Code Lookup

Look up 294 Hitachi fault codes and error codes, in plain English. Find your code below, then hand it to the AI assistant for what it means and the first things to check.

Full Hitachi fault code list

A generic J1939 reader pulls 121 of these; the other 173 need Hitachi tooling to read in full. Every listed code is below, in code order, 100 to a page.

Codes on file

294

Readable as J1939 SPN/FMI

121

Hitachi-specific

173

  • 00Inverter trip and output alarm on option error
  • 01Valid trip causes alarm output
  • 03Overload advance notice signal.
  • 08Instantaneous power failure/under-voltage.
  • 09Under voltage signal.
  • 101Operation selection error for OP1.
  • 102Operation selection error for OP2.
  • 106Invalid operation or no reverse gear engaged.
  • 121Fault indication for various operational states.
  • 126Over speed level detected.
  • 127Speed error detection level reached.
  • 141Low-current indication signal detection level.
  • 144Communication error time exceeded.
  • 176Electronic thermal overload detected.
  • 199Thermistor error level detected.
  • 28724Pump 5 & 6 failure, pressure issues and noise.
  • 34342Flashing light issue due to rubbed wire.
  • 34447Lube timer replaced; grease leak found and fixed.
  • 34506Grease leak at rear of bucket detected.
  • 34543Tightened grease lines on H Link bucket pins.
  • 34562Tightened grease line on stick injectors.
  • 34650Refitted loose grease lines on bucket.
  • 34660Found leaking injectors; bucket pins dry.
  • 34788Pump takes longer to build pressure; checked for leaks.
  • 34834Grease injector replacement needed; check oil pressure.
  • 34984Several leaks found; LH stick cylinder leaking.
  • 35192Bent bucket cylinder pipe straightened and refitted.
  • 35261Replaced broken fan belt.
  • 35406Greased lower boom cylinder pins.
  • 35479Repaired bucket pin cap and damaged grease lines.
  • 35503Tested grease system; 2 injectors not operating.
  • 36451Faulty injector found; grease leak on boom.
  • 37243Checked grease system for leaks.
  • 37290Cleaned contamination sensor in pump 6.
  • 37529Replaced cable for slope sensor.
  • 37532Grease alarm due to loose fittings on bucket.
  • 37536Replaced faulty windscreen wiper blade.
  • 37545Noisy pins; manually greased main boom cylinder pins.
  • 37555Cleaned contamination fault in pump 6.
  • 37617Cleaned contamination in pump 6.
  • 37629Replaced contamination sensor; main grease line damaged.
  • 37664Contamination sensor in pump 5 needs replacement.
  • 43995Flat batteries, unable to start machine.
  • 44076Low hydraulic oil level detected.
  • 44110LH lever fault due to wiring/sensor issue.
  • 44117Drive motor fault after pump swap.
  • 44201Low oil in drive motor, filled.
  • 44394Contamination light on pump 4.
  • 44416Contamination alarm on pump CO.
  • 44501Noise from stick arm due to low oil.
  • 44624Pump contamination light on.
  • 44775Contamination alarm sensor #5.
  • 45067Lube alarm due to grease line issue.
  • 45377Low hydraulic oil level detected.
  • 45392LH lever fault due to sensor issue.
  • 45454Boom cylinder hose leaking.
  • 45497Low hydraulic oil level detected.
  • 45498LH lever fault, sensor out of range.
  • 45792Replaced leaking pilot line.
  • 49334Boom lift error - EHC valve current low
  • 72917Power fault diagnosed, isolated issues.
  • A051Invalid inside DC braking condition
  • b002Restart on short instantaneous power failure
  • b003Delay before motor restart
  • b004Trip on instantaneous power failure/under-voltage
  • b005Instantaneous power failure detected.
  • b007Restart with 0Hz on low free-run frequency
  • b036No reduced voltage start
  • b090BRD not operating
  • b095BRD not operating
  • b098Invalid temperature protection by external thermistor
  • b099Thermistor error level detected
  • C061Thermal warning ineffective
  • E001Overcurrent error detected
  • E005Motor overload error
  • E006Braking resistor overload error
  • E007Overvoltage error detected
  • E008Memory error detected
  • E009Undervoltage error detected
  • E010Current detector error
  • E011CPU error detected
  • E012External trip error
  • E013USP error detected
  • E014Ground fault error detected
  • E015Incoming overvoltage error
  • E016Instantaneous power failure error
  • E019Temperature detector error
  • E020Cooling fan speed reduction error
  • E021Temperature error detected
  • E024Input open-phase error
  • E030IGBT error detected
  • E034Output open-phase error
  • E035Thermistor error detected
  • E036Brake error detected
  • E038Low-speed range overload error
  • E039Controller overload error
  • E040Operator keypad disconnection error
  • E041RS485 communication error
  • E042RTC error detected
  • E043EzSQ illegal instruction error

Fault code lists by brand

Looking for a different Hitachi code?Search the full fault-code database, or hand the code to the AI assistant for a plain-English explanation.