Generac Generator Fault Codes

409 documented Generac fault codes — causes, diagnosis and repair steps for each, drawn from OEM service literature. Page 1 of 2.

Air Intake

005423

Cooling

6-812051OVERTEMP16006-726912740120026284WLSAVR OVER-TEMP120422991501262481101272526502266012065-70153586100110542692ATS26262627HIGH TEMPERATURE14052651LOW COOLANT TEMPERATURE ALARM262327352399ECM-2C272027455270010F2RICH/LEAN FAULT CODESECM-2K140414002621262072690262215221401

Electrical

10612751LOW BATTERY ALARM2601BATTERY PROBLEM WARNING28012800274701533410502501004943BATTERY PROBLEMINSPECT BATTERY ALARM1907CHARGER FAIL2805UNDER VOLTAGE26022810LOW BATTERY29013534AINSPECT BATTERY2400280219161902000311180219031904CHARGER MISSING AC WARNING105120992-15005-1500

Fuel

2679268126875-35-52674280626762686267526823-12-226705-61-11-2005421267730022-526852684

General

019249005346SERVICE BMCORRUPTED FILE003273E2400000325AOVERLOADT1OL - OPEN CIRCUIT10480024630129801 SECOND FLASH (1 ON – 1 OFF)NO E-CODE ON HSBAUXILIARY SHUTDOWNOVERLOAD REMOVE LOAD10630153085051006504OL 014428WIRING ERROR0.01 014430E-CODE 1063STEPPER OVERCURRENT012984CHARGER WARNING2109505-J4211201297901298110651070LOW VOLTS REMOVE LOADUNSUPPORTED DEVICE100013450221000.01 014429015350RED LED ALARMINVALID FILE

Lubrication

F43215321718031518F519012614F127306-1F3P01344204LOW OIL PRESSURE0024312910278019002617HIGH-BACKPRESSURE ALARM26127440035032770

Sensors

0024934-36-2P03004-10031186-64-44-26-5003201

Speed

RPM SENSOR LOSSMIL CODENO CAM SIGNALOVERSPEED LED10661007OVERSPEED0129761208STOPPED-ALARM RPM SENSE LOSSOVERCRANK LEDUNDERSPEED13010026340C5969PROBLEM 14STOPPED- ALARM RPM SENSOR LOSS

Starting

000143FS1NOT ACTIVATED1416012977ALARM DISPLAY ICON FLASHING TWO (2) TIMESFLASHING FAULT WARNING ON DISPLAYLOW TEMP WARNING ICON ON DISPLAY2123002074LOW VOLTS REMOVE LOAD RED2201530325HIGH TEMP WARNING ICON ON DISPLAY242815021041MISWIRE1234SLOW-START ALARMCHECK BATTERYSOLID FAULT WARNING ON DISPLAY000333201913AC / DC DISPLAY ICON FLASHING

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