EFI Controller

The EFI is a generator-set controller. It is used on generator sets from Generac, including the GP18000EFI.

2
Generator sets
Generac
Brand
18–18 kW
Power range
Gasoline
Fuel

Generator sets using this controller

2

Troubleshooting

16

Fault codes

CodeMeaningRemedy
000136Equipment and property damageDisconnect electrical loads
1-1CO MonitorMove generator outside. Contact IASD.
1-2Battery VoltageContact IASD.
1-3Battery VoltageCharge battery to correct level.
10Engine fault code present.See Fault Code Example or contact IASD.
11Engine fault code present.See Fault Code Example or contact IASD.
12Engine fault code present.See Fault Code Example or contact IASD.
3Engine fault code present.See Fault Code Example or contact IASD.
5-2Engine SpeedFill fuel tank. Contact IASD.
6-1MIL is brightly illuminated and flashing.See Trouble-shooting.
OtroMúltipleComuníquese con un IASD.

Symptoms & remedies

SymptomCauseRemedy
Engine lacks power.1. Load is too high. 2. Dirty air filter. 3. Engine needs to be serviced.1. Reduce load (see Know Generator Limits). 2. Clean or replace air filter. 3. Contact IASD.
Engine shuts down during operation.1. Out of fuel. 2. Low oil level. 3. Engine fault code present.1. Fill fuel tank. 2. Fill crankcase to correct level. 3. See Fault Code Example or contact IASD.
Engine will not start; or starts and runs rough.1. Dirty air filter. 2. Out of fuel. 3. Stale fuel. 4. Spark plug wire not connected to spark plug. 5. Bad spark plug. 6. Water in fuel. 7. Low oil level. 8. Excessive rich fuel mixture. 9. Excessive lean fuel mixture. 10. Intake valve stuck open or closed. 11. Engine lost compression. 12. Engine fault code present.1. Clean or replace air filter. 2. Fill fuel tank. 3. Drain fuel tank and fill with fresh fuel. 4. Connect wire to spark plug. 5. Replace spark plug. 6. Drain fuel tank; fill with fresh fuel. 7. Fill crankcase to correct level. 8. Contact IASD. 9. Contact IASD. 10.Contact IASD. 11. Contact IASD. 12.See Fault Code Example or contact IASD.
MIL codes are flashing.1. Multiple.See Fault Code Example or contact IASD.
No battery charge DC output.1. Battery posts corroded. 2. Bad battery cable. 3. Defective battery. 4. Bad receptacle.1. Clean battery posts. 2. Replace cable. 3. Check battery condition. Replace if defective. 4. Contact IASD.

Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.