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DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION EC-265 C D E F G H I J K L M A EC DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION PFP:16600 On Board Diagnosis Logic EBS00MCM With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the DTC Confirmation Procedure EBS00MCN NOTE: WITH CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch “OFF” and wait at least 10 seconds. 3. Turn ignition switch “ON” and select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CON- 4. Clear the self-learning control coefficient by touching “CLEAR”. 5. Select “DATA MONITOR” mode with CONSULT-II. 6. Start engine again and let it idle for at least 10 minutes. 7. If it is difficult to start engine at step 6, the fuel injection system 8. Crank engine while depressing accelerator pedal. If engine EC-269, "Diagnostic Procedure" . If engine does not start, check exhaust and intake air leak visually. Sensor Input Signal to ECM ECM function Actuator Heated oxygen sensors 1 Density of oxygen in exhaust gas Fuel injection control Fuel injectors DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0171 Fuel injection system too ● Fuel injection system does not operate properly. ● The amount of mixture ratio compensation is too ● Intake air leaks ● Heated oxygen sensor 1 ● Injectors ● Exhaust gas leaks ● Incorrect fuel pressure ● Lack of fuel ● Mass air flow sensor ● Incorrect PCV hose connection P0174 SEF968Y |