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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 55 (Engine Control System (A25A-FXS) - Diagnostic Codes (P2270-P2610)) >> SFI System >> DTC P2270-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 Circuit Current Above Threshold; DTC P2271-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold [10/2022 - 11/2023] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different variant/trim than selected.
P2270: AIR FUEL RATIO SENSOR (SENSOR 2) LIMIT CURRENT (HIGH SIDE MALFUNCTION)

Duration of following condition 0.5 seconds or more
Air fuel ratio sensor (sensor 2) current 33.13 mA or more
P2271: AIR FUEL RATIO SENSOR (SENSOR 2) LIMIT CURRENT (LOW SIDE MALFUNCTION)

Duration of following condition 0.5 seconds or more
Air fuel ratio sensor (sensor 2) current Less than 7.5 mA
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