Generac Generator Fault Codes

373 documented Generac fault codes — causes, diagnosis and repair steps for each, drawn from OEM service literature. Page 2 of 2.

Air Intake

005422005423005433

Cooling

015322015358ATSE-CODE 1400ECM-2CECM-2GECM-2KF2HIGH TEMPERATURELOW COOLANT TEMPERATURE ALARMOVERCRANKOVERTEMPRICH/LEAN FAULT CODESWLSWTS

Electrical

004943004944013534A015334020476BATTERY PROBLEMCHARGER FAILCHARGER MISSING ACFIRMWARE ERROR-9INSPECT BATTERYINSPECT BATTERY ALARMLOW BATTERYLOW BATTERY ALARMLOW FUEL (10%)LOW FUEL (20%)OVERVOLTAGERED (FAULT) LEDUNDER VOLTAGEUNDERVOLTAGE

Fuel

005421

General

005346005347005348005349012979012980012981012982012983012984015307015308015349015350019249AUXILIARY SHUTDOWNCHARGER WARNINGCONTROLLER FAULTCORRUPTED FILEFILE NOT FOUNDFTFUSE PROBLEMINVALID FILELOW VOLTS REMOVE LOADMOL - OPEN CIRCUITOL 014428OL 014431OVERLOADOVERLOAD REMOVE LOADRED LED ALARMSERVICE ASERVICE BT1UNSUPPORTED DEVICEWIRING ERRORYELLOW LED MAINTENANCE

Lubrication

4204BATTERY CHARGER AC FAILURE ALARME-CODEF1F3F4F5HIGH-BACKPRESSURE ALARMLOW OIL PRESSUREP0134

Sensors

P0300SHUTDOWN SWITCH

Speed

005394012976015330IGNITION MODULE FAULT INDICATORMIL CODENO CAM SIGNALNO CRANK SIGNALOVERCRANK LEDOVERSPEEDOVERSPEED LEDPROBLEM 14R-200BUNDERSPEED

Starting

012977015303021041AC / DC DISPLAY ICON FLASHINGALARM DISPLAY ICON FLASHING TWO (2) TIMESCHECK BATTERYFLASHING FAULT WARNING ON DISPLAYFS1FUSE PROBLEM REDHIGH TEMP WARNING ICON ON DISPLAYLOW TEMP WARNING ICON ON DISPLAYLOW VOLTS REMOVE LOAD REDMILMISWIRENOT ACTIVATEDOVERCRANK REDOVERSPEED REDRPM SENSE LOSSSLOW-START ALARMSOLID FAULT WARNING ON DISPLAYSTEPPER OVERCURRENT REDUNDERSPEED REDUNDERVOLTAGE RED

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