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P0102, P0103 MAF SENSOR EC-571 < COMPONENT DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O P0102, P0103 MAF SENSOR Component Description INFOID:0000000005273531 The mass air flow sensor (1) is placed in the stream of intake air. It On Board Diagnosis Logic INFOID:0000000005273532 These self-diagnoses have the one trip detection logic. FAIL-SAFE MODE When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates. DTC Confirmation Procedure INFOID:0000000005273533 NOTE: 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. PROCEDURE FOR DTC P0102 1. Start engine and wait at least 5 seconds. 2. Check DTC. 3. If DTC is detected, go to . PROCEDURE FOR DTC P0103 1. Turn ignition switch ON and wait at least 5 seconds. 2. Check DTC. 3. If DTC is detected, go to . If DTC is not detected, go to next step. 4. Start engine and wait at least 5 seconds. 5. Check DTC. 6. If DTC is detected, go to . PBIA9559J DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0102 Mass air flow sensor An excessively low voltage from the sensor is sent • Harness or connectors (The sensor circuit is open or shorted.) • Intake air leaks P0103 Mass air flow sensor An excessively high voltage from the sensor is • Harness or connectors (The sensor circuit is open or shorted.) • Mass air flow sensor Detected items Engine operating condition in fail-safe mode Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut. |