Cummins/Onan GSBB troubleshooting: 21 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Cummins/Onan GSBB — full specs, parts & maintenance.
All Cummins/Onan fault codes →
| Code | Meaning |
|---|---|
| 2 | Low Oil Pressure Fault |
| 3 | Service Check Fault |
| 4 | Overcrank |
| 12 | Overvoltage |
| 13 | Undervoltage |
| 14 | Overfrequency |
| 15 | Underfrequency |
| 19 | Governor Actuator Shutdown |
| 22 | Governor Actuator Overload |
| 27 | Voltage Sense Lost |
| 29 | High Battery Voltage |
| 32 | Low Cranking Speed Sense |
| 35 | Control Card Failure |
| 36 | Generator Set Stopped Without Fault Condition |
| 37 | Invalid Set Configuration |
| 43 | Processor Fault |
| 45 | Speed Sense Fault |
| 46 | Generator Set Overload |
| 76 | Alternator Over Temp |
| 78 | Low Fuel Pressure |
| 79 | Failure To Transfer To Generator Set |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.