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EC-302 [QG (WITH EURO-OBD)] DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION (A/T MODELS) DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION (A/T MODELS) PFP:16600 On Board Diagnosis Logic EBS00QLZ With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the DTC Confirmation Procedure EBS00QM0 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. EC-306, "Diagnostic Procedure" . If engine does not start, remove ignition plugs and check for fouling, etc. 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 P0172 Fuel injection system too ● Fuel injection system does not operate properly. ● The amount of mixture ratio compensation is too ● Heated oxygen sensor 1 ● Injectors ● Exhaust gas leaks ● Incorrect fuel pressure ● Mass air flow sensor P0175 SEF215Z |