LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2018 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (4 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2270: O2 Sensor Signal Biased/Stuck Lean 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.

Judgment value 

Malfunction Criteria Threshold Value
Output voltage of rear oxygen sensor Less than 0.55V

Time needed for diagnosis:  15 seconds

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