LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2020 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.0L) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0140: 02 Sensor Circuit No Activity Detected Bank 1 Sensor 2 >> Diagnostic Method
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Method

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

Malfunction Criteria Threshold Value
Secondary oxygen sensor signal (B) < 0.375 V

Time needed for diagnosis:  1 second

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