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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 [12/2019 - 10/2022] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different variant/trim than selected.
Related DTCs P2270: Air fuel ratio sensor (sensor 2) signal stuck lean
P2271: Air fuel ratio sensor (sensor 2) signal stuck rich
Required Sensors/Components (Main) Air fuel ratio sensor (sensor 2)
Required Sensors/Components (Related) Crankshaft position sensor
Engine coolant temperature sensor
Throttle position sensor
Frequency of Operation Once per driving cycle
Duration 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None
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