Isuzu 4LE2X Tier 4 turbo diesel Engine

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• Overheat/shutdown condition
  Cause: (Check controller for engine fault shutdown code)
  Fix: Access doors are open. Close all access doors. Air outlets are closed. Open the air outlets and verify there are no obstructions or tight bends in the ducting. Front radiator or rear oil cooler are full of debris. Clean the unit. Engine rpm is set too high for ambient temperature. Lower the engine rpm. Faulty temperature sensor. Check air outlet sensor operation. Blower fan operating incorrectly. Remove ducting; check blower fan operation.
• Oil pressure does not rise
  Cause: Incorrect engine oil viscosity. Insufficient engine oil.
  Fix: Change with oil of correct viscosity. See Draining and Refilling the Oil. Replenish engine oil. See Draining and Refilling the Oil.
• Exhaust smoke is white
  Cause: Insufficient warm-up time. Engine control system failure.
  Fix: Conduct warm-up operation. Contact a GMP ASD.
• Exhaust smoke is black
  Cause: Excessive speed.
  Fix: Verify engine rpm. Check AVR adjustment.
• Engine will not crank (electric start)
  Cause: Discharged battery. Battery terminal is disconnected, loose, or corroded. Starter ground terminal is disconnected, loose, or corroded. Excessive engine oil viscosity.
  Fix: Replace battery. See Battery Installation and Replacement. Replace corroded part(s) and tighten securely. Examine starter ground terminal and replace if necessary. Change with oil of correct viscosity. See Draining and Refilling the Oil.
• Engine starts but stops shortly thereafter
  Cause: Low idle.
  Fix: Adjust by idling control equipment on the unit. If adjustment is not possible, contact a GMP ASD.
• Engine overheats
  Cause: No coolant. Front of radiator is clogged with dust. Subtank cap is not tightened. Fouled coolant. Oil in coolant. Thermostat failure.
  Fix: Add coolant. See Adding Coolant. Clean with soft brush. Tighten or replace sub tank cap. Clean inside of radiator and change coolant. Contact a GMP ASD. Change thermostat.
• Engine has no power
  Cause: Clogged air cleaner. Clogged pre-fuel filter. Clogged fuel filter. Clogged strainer.
  Fix: Clean element. Check restriction gauges/replace HTF filters. Remove water and change element. Contact a GMP ASD.
• Engine failure
  Cause: Engine control system failure.
  Fix: Contact a GMP ASD.
• Engine cranks but will not start
  Cause: No fuel. Insufficient oil level. PAS is ON. Air in fuel system. Clogged fuel filter. Gelled fuel. Injection pump failure. Electromagnetic type fuel pump failure. Engine control system failure.
  Fix: Verify there is no fuel leakage and replenish. Replenish oil to full. Turn PAS to OFF. See Resetting the PAS. Purge air from fuel system. Remove water and change element. Warm fuel pipes with hot water or wait until ambient temperature rises. Contact a GMP ASD.
• Digital Controller Status Messages
  Cause: Engine coolant temperature < 140 °F (38 °C). Engine rpm < 500 Fuel level < 10% Fuel level < 20%. Fuel level ≤ 16%. Fuel level ≤ 12%. Fuel level ≤ 8%.
  Fix: Wait approximately 10 seconds after heater powers up. Wait to Start signal Low Fuel Warning • Fuel level notification appears on screen • Low Fuel Level beacon turns on Fuel level ≤ 16% • Fuel level notification appears on screen • Heat/fan load reduced to 50% Fuel level ≤ 12% • Fuel level notification appears on screen • Open heat circuit and close scroll fan circuit • Drop engine to idle Fuel level ≤ 8% • Fuel level notification appears on screen • Engine shuts down

Compiled from service & troubleshooting documentation across every generator set that uses the Isuzu 4LE2X Tier 4 turbo diesel.

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

• Air filter: Isuzu 8972319000 Donaldson P827653 Wix 46671
• Fuel filter: Isuzu 8981527372 Donaldson P502163 Donaldson P502424 Wix 33393 Wix 33740
• Oil filter: Isuzu X13201002 Donaldson P557780 Wix 51452 Ac Delco PF960

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
• Sany SY70C — Excavator
• Sany SY75C — Excavator

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.