EFI SYSTEM
44
19 690 01 Rev. --
KohlerEngines.com
Code 0171
Component: Fuel System
Fault:
Maximum adaptation limit exceeded
Condition:
Fuel inlet screen/
fi
lter plugged, low
pressure at high pressure fuel line, TPS
malfunction, shorted connection, faulty
sensor, low fuel or wrong fuel type.
Conclusion: Oxygen Sensor Related
●
Corrosion or poor connection.
●
Sensor contaminated or damaged.
●
Air leak into exhaust.
●
Poor ground path.
●
Pin circuit wiring or connectors.
ECU Black pin 10 or Black pin 17.
TPS Sensor Related
●
Throttle plate position incorrect during
Learn procedure.
●
TPS problem or malfunction.
Engine Wiring Harness Related
●
Difference in voltage between sensed
voltage and actual sensor voltage.
●
Problem in wiring harness.
●
ECU-to-harness connection problem.
Systems Related
●
Ignition (spark plug, plug wire, ignition
coil).
●
Fuel (fuel type/quality, injector, fuel
pressure too low, fuel pump module or
lift pump).
●
Combustion air (air cleaner dirty/
restricted, intake leak, throttle bores).
●
Base engine problem (rings, valves).
●
Exhaust system leak (muf
fl
er,
fl
ange,
oxygen sensor mounting boss, etc.).
●
Fuel in crankcase oil.
Code 0172
Component: Fuel System
Fault:
Minimum adaptation limit exceeded
Condition:
Too high pressure at high pressure fuel
line, TPS malfunction, shorted
connection, faulty sensor or fuel pump
module failure.
Conclusion: Oxygen Sensor Related
●
Sensor connector or wiring.
●
Sensor contaminated or damaged.
●
Poor ground path.
●
Pin circuit wiring or connectors.
ECU Black pin 10 or 17.
TPS Sensor Related
●
Throttle plate position incorrect during
Learn procedure.
●
TPS problem or malfunction.
Engine Wiring Harness Related
●
Difference in voltage between sensed
voltage and actual sensor voltage.
●
Problem in wiring harness.
●
ECU-to-harness connection problem.
Systems Related
●
Ignition (spark plug, plug wire, ignition
coil).
●
Fuel (fuel type/quality, injector, fuel
pressure too high, fuel pump module or
lift pump).
●
Combustion air (air cleaner dirty/
restricted).
●
Base engine problem (rings, valves).
●
Fuel in crankcase oil.
●
Fuel pump module is over
fi
lled.
●
Lift pump diaphragm is ruptured.