Onan
Onan RV appliance fault codes
146 Onan fault codes and display messages across 12 model lines, each taken from Onan's own manuals and support pages. Pick your appliance and model to see its full code table.
Generators
- Cummins Onan QG gasoline generators (HGJAA, HGJAB, HGJBB) 32 codes
- Cummins Onan QG 2800i / 2500i LP inverter generators 29 codes
- Cummins Onan QG 2800 KV generators 4 codes
- Cummins Onan QG 4000 / 3600 LP generators 19 codes
- Cummins Onan QG 7000i dual-fuel inverter generators 25 codes
- Cummins Onan Quiet Diesel 5000-12500 generators 23 codes
- Cummins Onan Quiet Diesel 3200 generators 14 codes
Onan troubleshooting guides
- Onan generator stopped and shows a fault code
- Onan generator no-start cranking delay or overcrank
- Onan generator running but no output or breaker/load problem
- Onan generator high-altitude derating and fewer appliances
- Onan generator fuel, oil, and maintenance checks before starting
- Onan generator exhaust smell, CO detector, or ventilation shutdown
- Onan generator low battery or slow cranking
- Onan Energy Command AGS disabled after movement or safety input
- Onan Energy Command AUTO RUN LOW BAT or battery-sense start
- Onan Energy Command SERVICE DUE or SERVICE IN reminder
- Onan EC-AGS+ generator does not start in Auto Mode
- Onan EC-AGS+ generator does not run A/C
- Onan EC-AGS+ unexpected generator start or stop