Error Codes that Require an Authorized Service Dealer
Most error codes listed below exceed typical DIY troubleshooting and require a Generac Independent Authorized Service Dealer. Clearing simpler error codes can sometimes help determine if the issue persists. Users who wish to attempt clearing an alarm before contacting a dealer can follow instructions below or see How do I clear an error or alarm code on my standby generator? for more detail. A dealer can be located using the Generac Dealer Locator Tool.
Note: For a list of error codes that may be addressable by an end user, see: Where can I find a list of error codes for my generator?
Environment
These error codes apply to air and liquid cooled home standby generators. Error codes are displayed on the LCD display of the generator's controller. Note that not all generator controllers have an LCD screen. The generator's LED indicator light will be either yellow or red depending on the error.
Troubleshooting
Follow the below steps to determine if your error code requires service from a dealer:
1. Go to the front of the generator, lift the lid, and locate the Controller on the top right side of the generator.
2. Clear the alarm by pressing the red OFF button, then the ENTER button.
Note: For the 7.5kW PowerPact unit press the OFF button twice to clear an active alarm or maintenance/warning. If an active alarm and maintenance/warning are present at the same time, press the OFF button 3 times to clear.
3. Attempt to start the generator in manual mode by pressing the Manual button.
Note: If the generator starts successfully in manual mode, it will continue to run until shut down with the AUTO or OFF button.
Error Codes
| Error Code | Displayed Alarm |
| 134 | DTC |
| 180, 1001 | Controller |
| 1050 | VSCF Low Battery |
| 1051 | VSCF High Battery |
| 1058 | VSCF DC Under Voltage |
| 1059 | VSCF Field Loss |
| 1062 | VSCF Comms Loss |
| 1063 | VSCF Enable Mismatch |
| 1064 | VSCF Speed PWM Loss |
| 1065 | Over Frequency |
| 1500-1521 | RPM Sensor |
| 1800 - 1803 | Overvoltage |
| 1900 - 1916 | Undervoltage |
| 2098, 2099 | Wiring Error |
| 2399 | Stepper Overcurrent |
| 2500-2502 | Bosch |
| 2600 - 2602 | Ignition |
| 2611 - 2620 | Over current cylinder 1 -10 |
| 2621 - 2630 | Under current cylinder 1-10 |
| 2650 | Internal Ignition Missing Cam |
| 2651 | External Ignition Missing Cam |
| 2660 | Internal Ignition Missing Crank Pulses |
| 2661 | External Ignition Missing Crank Pulses |
| 2671, 2672 | CAN Bus |
| 2710 | Ruptured Tank |
| 2790 | SEEPROM Abuse |
| 2810 | Hall Calibration |
| 2900 | Diesel ECU Fault |
| 2910 | Gaseous Emissions |
| 3000, 3015 | Hardware Match Error |
| 3001 | Speed Match Error |
| 3002 | Fuel Match Error |
| 3003 | ECM Initiated Emergency Shutdown |
| 3100 - 3107, 3115, 3117 | Throttle Body Air |
| 3200, 3215 | High Fuel Pressure |
| 3201, 3217 | Low Fuel Pressure |
| 3202 - 3204 | Fuel Pressure |
| 3300, 3315, 3317 | High Oil Pressure |
| 3301 | Low Oil Pressure |
| 3302 - 3304 | Oil Pressure |
| 3400, 3415 | High MAP |
| 3401 | Low MAP |
| 3402 - 3404 | MAP |
| 3415 | High MAP |
| 3417 | LCM MAP |
| 3500, 3515 | High MAP Temp |
| 3501, 3517 | LCM Map Temp |
| 3502 - 3504 | MAP Temp |
| 3600, 3601, 3615, 3617 | Check Air Filter |
| 3602 - 3604 | Air Filter Sensor |
| 3700, 3715 | High Coolant Temp |
| 3701, 3717 | LCM Coolant Temp |
| 3702 - 3704 | Coolant Temp |
| 3803 | High Battery Voltage |
| 3804 | LCM Battery Voltage |
| 3900, 3915 | High Oil Temp |
| 3901, 3917 | Low Oil Temp |
| 3902 - 3904 | Oil Temp |
| 4003, 4004 | Fuel System |
| 4100 - 4104 | Crankshaft Sensor |
| 4200 - 4204 | Camshaft Sensor |
| 4300 - 4304, 4315, 4317 | Check O2 Sensor |
| 4400 - 4404, 4415, 4417 | Engine Knock Sensor |
| 4502 - 4507 | Ignition Coil 1 |
| 4602 - 4607 | Ignition Coil 2 |
| 4702 - 4707 | Ignition Coil 3 |
| 4802 - 4807 | Ignition Coil 4 |
| 4900 - 4907, 4915, 4917 | Fuel Mixer |
| 5003, 5004 | CAC |
| 5100, 5115 | RPM High |
| 5101, 5117 | RPM Low |
| 5102, 5107 | RPM |
