Honda
Honda Standby Generators Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Generator will not start, control panel shows E01 immediately after crank attempt
Low Oil Level / Low Oil Pressure Shutdown
E02
Generator shuts down shortly after starting, control panel displays E02
High Engine Temperature / Overheat Shutdown
E03
Generator cranks but does not start, then displays E03 on the controller
No Fuel / Fuel Supply Fault
E04
Generator shuts down during operation and displays E04
Overspeed Protection Trip
E05
Generator shuts down and displays E05, often under heavy load
Underspeed / Engine Speed Too Low
E06
Generator controller shows E06 and will not attempt to start
Battery Voltage Low / Battery Fault
E07
Generator controller displays E07 and engine will not crank
Starter Circuit Fault
E08
Generator runs briefly then stops, controller shows E08
Low AC Output Voltage / Under-Voltage Protection
E09
Generator shuts down and displays E09 when large loads start (e.g., air conditioner)
Overcurrent / Overload Trip
E10
Controller shows E10, generator will not start automatically on power outage
Utility Sensing / Phase Loss Fault
E11
Generator attempts to start repeatedly but fails, controller logs E11
Failed Start / Exceeded Crank Attempts
E12
Generator runs but controller shows E12 and may not transfer load
Frequency Out of Range
E13
Controller displays E13 and generator will not run, often after wiring changes
Phase Rotation / Phase Sequence Error (3‑Phase Models)
E14
Generator shuts down and displays E14 shortly after start
Oil Temperature High / Oil Overheat
E15
Controller shows E15, generator will not start, often after a lightning storm or power surge
Controller Communication / Internal Fault
E16
Generator runs but controller displays E16 and may limit output
Exhaust Temperature High
E17
Controller shows E17, generator will not transfer load even though it is running
Transfer Switch Position / Feedback Fault
E18
Generator controller displays E18 and logs fuel-related alarms
Fuel Level Sensor / Fuel Supply Monitoring Fault
E19
Controller shows E19, generator stops unexpectedly during run
Emergency Stop / Remote Stop Activated
E20
Controller displays E20 and prevents start, often after maintenance
Door / Panel Interlock Open
Symptom
Controller display is blank or unreadable, generator otherwise appears intact
Display / HMI Failure
Symptom
Corrosion visible on electrical terminals and metal surfaces inside enclosure
Moisture Ingress / Corrosion Damage
Symptom
Fuel smell around generator, visible fuel dripping from under the unit
External Fuel Leak
Symptom
Generator cranks slowly or not at all, no error code displayed
Weak or Failing Starting Battery
Symptom
Generator emits black smoke from exhaust under load
Rich Fuel Mixture / Incomplete Combustion
Symptom
Generator emits blue or bluish-gray smoke from exhaust
Engine Oil Burning
Symptom
Generator emits white smoke, especially on startup
Coolant or Unburned Fuel in Exhaust
Symptom
Generator is excessively noisy or rattles during operation
Abnormal Vibration / Noise
Symptom
Generator leaks coolant under the unit or around the radiator
Engine Coolant Leak
Symptom
Generator runs but controller logs frequent nuisance alarms without obvious issues
Sensor Drift / Intermittent Sensor Faults
Symptom
Generator runs but house lights flicker and voltage seems unstable
Unstable Voltage Output
Symptom
Generator runs but produces no AC power at the output terminals
Loss of Excitation / No Output
Symptom
Generator runs but trips its main breaker intermittently
Intermittent Overload or Short
Symptom
Generator runs rough, misfires, or surges at no load
Unstable Engine Operation
Symptom
Generator shuts down after running for some time, then restarts after cooling
Thermal Shutdown / Overheating
Symptom
Generator starts and runs but does not transfer power to the house
Automatic Transfer Switch Fails to Transfer
Symptom
Generator starts and then stalls when large appliances turn on
Load-Induced Stalling
Symptom
Generator will not start in cold weather
Cold Start Difficulty
Symptom
Strong exhaust fumes or exhaust smell entering building during generator operation
Exhaust Fume Intrusion
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Generator will not start, control panel shows E01 immediately after crank attempt
|
Low Oil Level / Low Oil Pressure Shutdown | View Details |
| E02 |
Generator shuts down shortly after starting, control panel displays E02
|
High Engine Temperature / Overheat Shutdown | View Details |
| E03 |
Generator cranks but does not start, then displays E03 on the controller
|
No Fuel / Fuel Supply Fault | View Details |
| E04 |
Generator shuts down during operation and displays E04
|
Overspeed Protection Trip | View Details |
| E05 |
Generator shuts down and displays E05, often under heavy load
|
Underspeed / Engine Speed Too Low | View Details |
| E06 |
Generator controller shows E06 and will not attempt to start
|
Battery Voltage Low / Battery Fault | View Details |
| E07 |
Generator controller displays E07 and engine will not crank
|
Starter Circuit Fault | View Details |
| E08 |
Generator runs briefly then stops, controller shows E08
|
Low AC Output Voltage / Under-Voltage Protection | View Details |
| E09 |
Generator shuts down and displays E09 when large loads start (e.g., air conditioner)
|
Overcurrent / Overload Trip | View Details |
| E10 |
Controller shows E10, generator will not start automatically on power outage
|
Utility Sensing / Phase Loss Fault | View Details |
| E11 |
Generator attempts to start repeatedly but fails, controller logs E11
|
Failed Start / Exceeded Crank Attempts | View Details |
| E12 |
Generator runs but controller shows E12 and may not transfer load
|
Frequency Out of Range | View Details |
| E13 |
Controller displays E13 and generator will not run, often after wiring changes
|
Phase Rotation / Phase Sequence Error (3‑Phase Models) | View Details |
| E14 |
Generator shuts down and displays E14 shortly after start
|
Oil Temperature High / Oil Overheat | View Details |
| E15 |
Controller shows E15, generator will not start, often after a lightning storm or power surge
|
Controller Communication / Internal Fault | View Details |
| E16 |
Generator runs but controller displays E16 and may limit output
|
Exhaust Temperature High | View Details |
| E17 |
Controller shows E17, generator will not transfer load even though it is running
|
Transfer Switch Position / Feedback Fault | View Details |
| E18 |
Generator controller displays E18 and logs fuel-related alarms
|
Fuel Level Sensor / Fuel Supply Monitoring Fault | View Details |
| E19 |
Controller shows E19, generator stops unexpectedly during run
|
Emergency Stop / Remote Stop Activated | View Details |
| E20 |
Controller displays E20 and prevents start, often after maintenance
|
Door / Panel Interlock Open | View Details |
| – |
Controller display is blank or unreadable, generator otherwise appears intact
|
Display / HMI Failure | View Details |
| – |
Corrosion visible on electrical terminals and metal surfaces inside enclosure
|
Moisture Ingress / Corrosion Damage | View Details |
| – |
Fuel smell around generator, visible fuel dripping from under the unit
|
External Fuel Leak | View Details |
| – |
Generator cranks slowly or not at all, no error code displayed
|
Weak or Failing Starting Battery | View Details |
| – |
Generator emits black smoke from exhaust under load
|
Rich Fuel Mixture / Incomplete Combustion | View Details |
| – |
Generator emits blue or bluish-gray smoke from exhaust
|
Engine Oil Burning | View Details |
| – |
Generator emits white smoke, especially on startup
|
Coolant or Unburned Fuel in Exhaust | View Details |
| – |
Generator is excessively noisy or rattles during operation
|
Abnormal Vibration / Noise | View Details |
| – |
Generator leaks coolant under the unit or around the radiator
|
Engine Coolant Leak | View Details |
| – |
Generator runs but controller logs frequent nuisance alarms without obvious issues
|
Sensor Drift / Intermittent Sensor Faults | View Details |
| – |
Generator runs but house lights flicker and voltage seems unstable
|
Unstable Voltage Output | View Details |
| – |
Generator runs but produces no AC power at the output terminals
|
Loss of Excitation / No Output | View Details |
| – |
Generator runs but trips its main breaker intermittently
|
Intermittent Overload or Short | View Details |
| – |
Generator runs rough, misfires, or surges at no load
|
Unstable Engine Operation | View Details |
| – |
Generator shuts down after running for some time, then restarts after cooling
|
Thermal Shutdown / Overheating | View Details |
| – |
Generator starts and runs but does not transfer power to the house
|
Automatic Transfer Switch Fails to Transfer | View Details |
| – |
Generator starts and then stalls when large appliances turn on
|
Load-Induced Stalling | View Details |
| – |
Generator will not start in cold weather
|
Cold Start Difficulty | View Details |
| – |
Strong exhaust fumes or exhaust smell entering building during generator operation
|
Exhaust Fume Intrusion | View Details |
No matching codes found
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