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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (2GR-FKS) - Diagnostic Codes (6 Of 6) & Circuit Tests (1 Of 2) >> SFI System >> DTC P2237-11: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2237-12: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P2237-13: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Open; DTC P2237-16: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Below Threshold; DTC P2237-17: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Above Threshold; DTC P2237-1B: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Resistance Above Threshold; DTC P2240-11: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Short to Ground; DTC P2240-12: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Short to Battery; DTC P2240-13: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Open; DTC P2240-16: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Voltage Below Threshold; DTC P2240-17: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Voltage Above Threshold; DTC P2240-1B: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 1 Circuit Resistance Above Threshold; DTC P2251-11: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2251-12: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P2254-11: O2 Sensor Negative Current Control Bank 2 Sensor 1 Circuit Short to Ground; DTC P2254-12: O2 Sensor Negative Current Control Bank 2 Sensor 1 Circuit Short to Battery [12/2019 - 10/2022] >> Monitor Strategy

Monitor Strategy

Related DTCs P2237: Air fuel ratio sensor (bank 1) open circuit between A1A+ and A1A-
P2238: Air fuel ratio sensor (bank 1) low admittance
P2238: Air fuel ratio sensor (bank 1) short circuit between A1A+ and GND
P2238: Air fuel ratio sensor (bank 1) short circuit between A1A+ and A1A-
P2239: Air fuel ratio sensor (bank 1) short circuit between A1A+ and +B
P2239: Air fuel ratio sensor (bank 1) short circuit between A1A+ and A1A-
P2240: Air fuel ratio sensor (bank 2) open circuit between A2A+ and A2A-
P2241: Air fuel ratio sensor (bank 2) low admittance
P2241: Air fuel ratio sensor (bank 2) short circuit between A2A+ and GND
P2241: Air fuel ratio sensor (bank 2) short circuit between A2A+ and A2A-
P2242: Air fuel ratio sensor (bank 2) short circuit between A2A+ and +B
P2242: Air fuel ratio sensor (bank 2) short circuit between A2A+ and A2A-
P2252: Air fuel ratio sensor (bank 1) short circuit between A1A- and GND
P2253: Air fuel ratio sensor (bank 1) short circuit between A1A- and +B
P2255: Air fuel ratio sensor (bank 2) short circuit between A2A- and GND
P2256: Air fuel ratio sensor (bank 2) short circuit between A2A- and +B
Required Sensors/Components (Main) Air fuel ratio sensor
Required Sensors/Components (Related) Engine coolant temperature sensor
Crankshaft position sensor
Frequency of Operation Continuous
Duration 10 seconds: P2237 and P2240
10 seconds: P2238 and P2241 (air fuel ratio sensor low admittance)
5 seconds: Others
MIL Operation 2 driving cycles
Sequence of Operation None
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