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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0101: Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance >> General Description >> Diagnostic Method

Diagnostic Method

Judge as NG when low side or high side is established.

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment value

THRESHOLD VALUE SPECIFICATION - LOW

Malfunction Criteria Threshold Value
Airflow amount Less than 14.2 g/s (0.5 oz/s)
THRESHOLD VALUE SPECIFICATION - HIGH

Malfunction Criteria Threshold Value
Airflow amount 14.2 g/s (0.5 oz/s) or more

Time needed for diagnosis:  5000 ms

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.