Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Lexus LS 500 Base, AWDFACTORY OEM SERVICE PROCEDURE
Engine Control System - Diagnostic Codes (13 Of 14)
- 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 [09/2019 - 10/2020]
- 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 [10/2020 - 10/2022]
- 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 [10/2022 - 10/2023]
- 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 [10/2023 - ]
- 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; DTC P2272-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 2 Sensor 2 Circuit Current Above Threshold; DTC P2273-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2 Circuit Current Below Threshold [12/2017 - 09/2018]
- 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; DTC P2272-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 2 Sensor 2 Circuit Current Above Threshold; DTC P2273-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2 Circuit Current Below Threshold [09/2018 - ]
- DTC P22AB-11: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground; DTC P22AB-12: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Battery; DTC P22AB-13: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Open; DTC P22AB-16: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Below Threshold; DTC P22AB-17: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Above Threshold; DTC P22B2-11: A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Ground; DTC P22B2-12: A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Battery; DTC P22B8-11: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 2 Circuit Short to Ground; DTC P22B8-12: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 2 Circuit Short to Battery; DTC P22B8-13: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 2 Circuit Open; DTC P22B8-16: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 2 Circuit Voltage Below Threshold; DTC P22B8-17: A/F (O2) Sensor Positive Current Control Bank 2 Sensor 2 Circuit Voltage Above Threshold; DTC P22BF-11: A/F (O2) Sensor Negative Current Control Bank 2 Sensor 2 Circuit Short to Ground; DTC P22BF-12: A/F (O2) Sensor Negative Current Control Bank 2 Sensor 2 Circuit Short to Battery [12/2017 - ]
- DTC P23AA-72: Turbocharger/Supercharger Bypass Valve "A" Actuator Stuck Open; DTC P2C29-72: Turbocharger/Supercharger Bypass Valve "B" Actuator Stuck Open [12/2017 - 10/2020]
- DTC P23AA-72: Turbocharger/Supercharger Bypass Valve "A" Actuator Stuck Open; DTC P2C29-72: Turbocharger/Supercharger Bypass Valve "B" Actuator Stuck Open [10/2020 - ]
- DTC P2418-7F: Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off [12/2017 - 09/2019]
- DTC P2418-7F: Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off [09/2019 - ]
- DTC P24D5-11: EVAP System Pressure Sensor/Switch "B" Circuit Low Circuit Short to Ground; DTC P2B7A-11: EVAP System Pressure Sensor/Switch "C" Circuit Low Circuit Short to Ground [12/2017 - ]
- DTC P24D5-15: EVAP System Pressure Sensor/Switch "B" Circuit High Circuit Short to Battery or Open; DTC P2B7A-15: EVAP System Pressure Sensor/Switch "C" Circuit High Circuit Short to Battery or Open [12/2017 - ]
- DTC P24D5-1F: EVAP System Pressure Sensor/Switch "B" Circuit Intermittent Circuit Intermittent; DTC P2B7A-1F: EVAP System Pressure Sensor/Switch "C" Circuit Intermittent Circuit Intermittent [12/2017 - ]
- DTC P2533-14: Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open [10/2023 - ]
- DTC P2610-29: ECM/PCM Engine Off Timer Performance Signal Invalid; DTC P2610-93: ECM/PCM Engine Off Timer Performance No Operation [12/2017 - 10/2023]
- DTC P2610-29: ECM/PCM Engine Off Timer Performance Signal Invalid; DTC P2610-93: ECM/PCM Engine Off Timer Performance No Operation [10/2023 - ]
- DTC P2AB7-11: Wastegate Position Sensor "A" Circuit Short to Ground; DTC P2ABA-11: Wastegate Position Sensor "B" Circuit Short to Ground [12/2017 - 10/2020]
- DTC P2AB7-11: Wastegate Position Sensor "A" Circuit Short to Ground; DTC P2ABA-11: Wastegate Position Sensor "B" Circuit Short to Ground [10/2020 - ]
- DTC P2AB7-15: Wastegate Position Sensor "A" Circuit Short to Battery or Open; DTC P2ABA-15: Wastegate Position Sensor "B" Circuit Short to Battery or Open [12/2017 - ]
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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