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Home >> Subaru >> 2017 >> Outback 2.5i >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (P000A To P015B) (H4DO) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0101: Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

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 

Except for PZEV model  CVT model Engine speed (rpm) 1900 3000 4000 5000 6000 6800
Output voltage (V) 1.22 1.22 1.22 1.22 1.22 1.22
MT model Engine speed (rpm) 1500 2000 2500 3000 - -
Output voltage (V) 1.17 1.17 1.17 1.17 - -
PZEV model  Engine speed (rpm) 1900 3000 4000 5000 6000 6800
Output voltage (V) 1.73 1.96 2.12 2.25 2.37 2.45

Map 2 

Except for PZEV model  Engine speed (rpm) 525 700 925
Output voltage (V) 2.1 2.1 2.1
PZEV model  Engine speed (rpm) 525 700 925
Output voltage (V) 1.69 1.83 1.97

Time Needed for Diagnosis: 

Low: 5000 ms

High: 5000 ms

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