47
24 690 31 Rev. D
KohlerEngines.com
Propane EFI System
Code 0174
Component: Fuel System
Fault:
Lean fuel condition
Condition:
Fuel fi lters plugged, low pressure at high
pressure fuel line, TPS malfunction,
shorted connection or faulty sensor.
Conclusion: TPS Learn Incorrect
● Lean condition (check oxygen sensor
signal with VOA and see Oxygen
Sensor).
Engine Wiring Harness Related
● Pin circuit wiring or connectors.
ECU pin Black 10, 12, 16 and 17.
Low Fuel Pressure
● Low/empty fuel tank.
● Plugged fi lters.
● Bad regulator.
Oxygen Sensor Related
● Sensor connector or wiring problem.
● Exhaust leak.
● Poor ground.
Poor system ground from ECU to engine,
causing rich running while indicating lean.
Fuel lock-off connection. See Fuel
Components.
Code 0201
Component: Fuel Injector
Fault:
Injector 1 Circuit Malfunction
Condition:
Injector damaged or faulty, shorted or
open connection.
Conclusion: Injector Related
● Injector coil shorted or opened.
Engine Wiring Harness Related
● Broken or shorted wire in harness.
ECU pin Black 5.
● Wiring from Ignition.
ECU Related
● Circuit controlling injector #1 damaged.
Code 0202
Component: Fuel Injector
Fault:
Injector 2 Circuit Malfunction
Condition:
Injector damaged or faulty, shorted or
open connection.
Conclusion: Injector Related
● Injector coil shorted or opened.
Engine Wiring Harness Related
● Broken or shorted wire in harness.
ECU pin Black 6.
● Wiring from Ignition.
ECU Related
● Circuit controlling injector #2 damaged.
Code 0230
Component: Fuel Lock-off
Fault:
Circuit Low Voltage or Open
Condition:
Shorted or open connection.
Conclusion: Fuel Lock-off Related
● Fuel lock-off open or shorted internally.
Engine Wiring Harness related
● Broken or shorted wire in harness.
ECU pin Black 9 or Grey 17.
ECU Related
● ECU is damaged.
Code 0232
Component: Fuel Lock-off
Fault:
Circuit High Voltage
Condition:
Shorted connection.
Conclusion: Fuel Lock-off Related
● Fuel lock-off damaged internally.
Charging Output System Too High.
