John Deere PE4045HFG92 Engine

Shared across brands: Generac, Magnum

How to read your John Deere engine serial & model number →

• Low fuel level shutdown
  Cause: Fuel level low; fuel tank leaks; fuel level sender or connecting wiring damaged
  Fix: Check the fuel level on the LCD window and confirm the generator is sitting level; check for leaks in the fuel tank; check the fuel level sender and the connecting wiring for damage and check for continuity between the sender and the engine controller
• High coolant temperature shutdown
  Cause: Coolant level low in overflow jug; radiator shroud and ducting blocked; coolant leaks in hoses, engine block or water pump; serpentine drive belt for the water pump loose; engine overheating
  Fix: Check the coolant level in the overflow jug; restart the engine and read the coolant temperature to verify High Coolant Temperature Shutdown, stopping the engine immediately if the coolant temperature is 230°F (110°C) or more; allow the engine to cool, add coolant to the overflow jug if low and check the radiator level, adding coolant until it is 3/4 in (2 cm) below the filler neck and securing the radiator cap; check the radiator shroud and ducting for blockage and remove any foreign matter; inspect coolant hoses, engine block and water pump for visible leaks; check the tension of the serpentine drive belt for the water pump; if no other problems are found, remove the load on the generator and restart the engine, checking the coolant temperature and shutting the engine down immediately if it starts to overheat, and consult the engine operation and maintenance manual
• Low coolant level shutdown
  Cause: Coolant level low; coolant leaks in hoses, engine block or water pump; coolant mixed with engine oil
  Fix: Allow the engine to cool; check the coolant level in the radiator and add coolant until it is 3/4 in (2 cm) below the filler neck, then secure the radiator cap; inspect coolant hoses, engine block and water pump for visible leaks; check the engine oil to verify no coolant has mixed with it and consult the engine operation and maintenance manual
• Overspeed or underspeed shutdown
  Cause: Frequency above or below 60.0 Hz with no loads on the generator (engine speed requires adjustment)
  Fix: Disconnect all loads and restart the generator, read the frequency (Hz) on the LCD display (should read 60.0 Hz with no loads); if the frequency is above or below 60.0 Hz, adjust the engine speed — see the engine manual for throttle adjustments on mechanical governed units and the electronic governor manual for electronically controlled units
• Low oil pressure shutdown
  Cause: Engine oil level low; oil leaks; loss of oil pressure; oil pressure sender faulty
  Fix: Check the level of the engine oil with the dipstick and add oil if required; visually inspect the engine for oil leaks; restart the unit and verify the loss of oil pressure, shutting the engine down immediately if the oil pressure value does not read five (5) psi (34 kPa) within five (5) seconds; check the oil pressure sender and refer to the troubleshooting section of the engine operation and maintenance manual
• Overcrank shutdown
  Cause: Fuel level low; fuel pump not operating properly; air filter blocked; engine will not start
  Fix: Check the fuel level in the tank; check for proper operation of the fuel pump; check air filter for blockage; if the engine will not start, consult the engine operation and maintenance manual for additional information on troubleshooting starting problems
• WrnMaintenance — The period for servicing is set by the WrnMaintenance setpoint. The protection comes active if the running hours of the engine reach this value. WrnMaintenance
  Fix: Reset the running hours to 250: with the unit shut down, power up the controller with the CONTROL ON/OFF toggle switch; press the PAGE SELECT button; press the down button to move the > cursor down to the Engine Protect line of text; press ENTER; press ENTER again; press the up button and reset the current run time hour setting to 250; press ENTER to save the current run time hour setting; move the CONTROL ON/I toggle switch to the CONTROL OFF/O position
• Wrn RA15 fail — Warning alarm in case of lost connection to IGL=RA15 module. Wrn RA15 fail
• Wrn ECU Alarm — ECU alarm list is not empty. Wrn ECU Alarm
• TimingSensor SPN:637
• PositionSensor SPN:636
• Intake Temp SPN:105
• InjectorCyl#6 SPN:656
• InjectorCyl#5 SPN:655
• InjectorCyl#4 SPN:654

Compiled from service & troubleshooting documentation across every generator set that uses the John Deere PE4045HFG92.

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

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

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