Isuzu 4LE2TAGV-08 Engine

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• Unit cranks but does not start
  Cause: Low fuel level
  Fix: Verify fuel level in tank.
• High coolant temperature shutdown
  Cause: Low coolant level
  Fix: Allow engine to cool. Check coolant level in radiator. Add coolant level if needed.
• Unit starts but stumbles and dies
  Cause: Low ambient temperature
  Fix: Verify if ambient temperature is within unit limits.
• Mast lights off, checking inside control box
  Cause: Loose lighting connections
  Fix: Inspect the connections inside the control box.
• One or more lights do not turn on
  Cause: Light breaker tripped.
  Fix: Inspect light breakers.
• Low oil pressure shutdown
  Cause: Low oil level
  Fix: Check oil level.
• Warning fault operates
  Fix: Check relevant switch and wiring of fault indicated on LCD display; Check configuration of input.
• Unit stalls when export power is used
  Cause: Load exceeds unit rating
  Fix: Turn outlet breaker ON and load sense switch OFF, confirm generator output is 60 Hz ± 2 Hz. Reapply load.
• Unit shuts down
  Fix: Check DC supply voltage is not above 35 V or below 9 V; Check the operating temperature is not above 70 °C. Check the DC fuse.
• Unit is inoperative — Read/Write configuration does not operate
  Fix: Check the battery and wiring to the unit; Check the DC supply; Check the DC fuse.
• Starter motor inoperative
  Fix: Check wiring to starter solenoid. Check battery supply. Check battery supply is present on the Starter output of module. Ensure oil pressure switch or sensor is indicating the low oil pressure state to the controller.
• Shutdown fault operates
  Fix: Check relevant switch and wiring of fault indicated on LCD display; Check configuration of input.
• Pre-heat inoperative
  Fix: Check wiring to engine heater plugs. Check battery supply. Check battery supply is present on the Pre-heat output of module. Check pre-heat configuration is correct.
• Low Oil Pressure operates after engine has fired
  Fix: Check engine oil pressure; Check oil pressure switch/sensor and wiring; Check configured polarity (if applicable) is correct (i.e. Normally Open or Normally Closed) or that sensor is compatible with the controller and is correctly configured.
• Incorrect reading on engine gauges — Fail To Stop when engine is at rest
  Fix: Check engine is operating correctly; Check that sensor is compatible with the controller and that the controller configuration is suited to the sensor.

Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu 4LE2TAGV-08.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

• Air filter: Generac OE3557 Generac OE3656 Isuzu 8972319000 Isuzu 5864014350 Isuzu 8972599390 Donaldson P827653 Donaldson P821575 Donaldson P822858
• Fuel filter: Generac 69858 Isuzu 8944015310 Isuzu H132401 Donaldson P502166 Donaldson P550057 Wix 33263 Baldwin PF981 Wix 33386
• Oil filter: Generac 670570304 Isuzu 5876100080 Donaldson P550162 Wix 51334 Ac Delco X45 Baldwin B179

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

• Hitachi ZX40U — Excavator Compact
• Hitachi ZX50U — Excavator Compact
• Kobelco SK80 — Excavator Tracked

Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.