LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2019 >> Outback 2.5i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0101: Mass Or Volume Air Flow Sensor "A" Circuit Range/Performance >> Diagnostic Method
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 of Map 2
ENGINE SPEED DESCRIPTION - MAP 1

Engine speed (rpm) 1900 3000 4000 5000 6000 6800
Output voltage (V) 1.73 1.96 2.12 2.25 2.37 2.45
ENGINE SPEED DESCRIPTION - MAP 2

Engine speed (rpm) 525 700 925
Output voltage (V) 1.69 1.83 1.97

Time Needed for Diagnosis: 

Low: 5000ms

High: 5000ms

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