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Home >> Subaru >> 2017 >> Legacy 2.5i Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Control System (Diagnostics) (P000A To P015D) (H6DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0101: Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge as NG when Low side or High side becomes NG.

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

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Low   
Output voltage < Value of Map 1
High   
Output voltage ≥ Value from Map 2
MAP 1 VALUE SPECIFICATION

Engine speed (rpm) 1600 2000 3000 4000 5000 6000 6800
Output voltage (V) 1.86 1.99 2.23 2.43 2.59 2.73 2.83
MAP 2 VALUE SPECIFICATION

Engine speed (rpm) 525 600 700 800 900 950
Output voltage (V) 1.52 1.58 1.65 1.71 1.76 1.79

Time Needed for Diagnosis: 

Low: 5000 ms

High: 5000 ms

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