5162 690 05 Rev. H KohlerEngines.com
EFI SYSTEM-ELECTRONIC THROTTLE BODY (ETB)
Fault Code MIL Blinks SPN FMI
Code P0174 1/10/8/13 4237 31
Component: Fuel System
Fault: Lean fuel condition
Condition: Fuel inlet screen/fi lter plugged, low
pressure at high pressure fuel line, TPS
malfunction, shorted connection or faulty
sensor.
Conclusion: TPS Auto-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
● Plugged fi lters.
● Bad lift pump.
● Vapor lock.
Oxygen Sensor Related
● Sensor connector or wiring problem.
● Exhaust leak.
● Poor ground.
● Contaminated sensor.
Poor system ground from ECU to engine,
causing rich running while indicating lean.
Fuel pump module connection. See Fuel
Components.
Fault Code MIL Blinks SPN FMI
Code P0201 10/2/8/11 651 31
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.
Fault Code MIL Blinks SPN FMI
Code P0202 10/2/8/11 652 31
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.
Fault Code MIL Blinks SPN FMI
Code P0217 10/10/6/14 110 0
Component: Engine Overheat Warning
Fault: Overheat
Condition: Engine operating at or above
recommended temperature limit.
Conclusion: Throttle opening is limited, value varies
by engine model.
● Ramps in and out of limit.
Provides an alert to operator of a
condition that may cause damage to
engine.
● Typically this is remedied by clearing
debris blocking engine cooling air fl ow.
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