Diagnostic Trouble Code Chart [10/2018 - 08/2021]

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.

SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION, HV MODEL)

DTC No.	Detection Item	Link
B2271	Ignition Hold Monitor Malfunction	Refer to DTC B2271: Ignition Hold Monitor Malfunction [10/2018 - ]
B2274	ACC Monitor Malfunction	Refer to DTC B2274: ACC Monitor Malfunction [10/2018 - ]
B2275	STSW Monitor Malfunction	Refer to DTC B2275: STSW Monitor Malfunction [10/2018 - ]
B2277	Detecting Vehicle Submersion	Refer to DTC B2277: Detecting Vehicle Submersion [10/2018 - ]
B2278	Engine/Power Switch Malfunction	Refer to DTC B2278: Engine/Power Switch Malfunction [10/2018 - ]
B2282	Vehicle Speed Signal Malfunction	Refer to DTC B2282: Vehicle Speed Signal Malfunction; DTC B2283: Vehicle Speed Sensor Malfunction [10/2018 - 07/2022]
B2283	Vehicle Speed Sensor Malfunction	Refer to DTC B2282: Vehicle Speed Signal Malfunction; DTC B2283: Vehicle Speed Sensor Malfunction [10/2018 - 07/2022]
B2284	Brake Signal Malfunction	Refer to DTC B2284: Brake Signal Malfunction [10/2018 - ]
B2285	Steering Lock Position Signal Circuit Malfunction	Refer to DTC B2285: Steering Lock Position Signal Circuit Malfunction [10/2018 - 07/2022]
B228B	System Voltage or GND Energization Malfunction	Refer to DTC B228B: System Voltage or GND Energization Malfunction [10/2018 - ]
B2779	Engine Starter Communication Malfunction	Refer to DTC B2779: Engine Starter Communication Malfunction [10/2018 - ]
B2781	Open / Short in Steering Lock ECU	Refer to DTC B2781: Open / Short in Steering Lock ECU [10/2018 - 07/2022]
B2782	Power Source Control ECU Malfunction	Refer to DTC B2782: Power Source Control ECU Malfunction [10/2018 - 07/2022]
B2784	Antenna Coil Open / Short	Refer to DTC B2784: Antenna Coil Open / Short [10/2018 - ]
B2788	IG2 Signal Malfunction	Refer to DTC B2788: IG2 Signal Malfunction [10/2018 - 07/2022]
B278A	Short to GND in Immobiliser System Power Source Circuit	Refer to DTC B278A: Short to GND in Immobiliser System Power Source Circuit [10/2018 - ]
B2790	ID BOX EEPROM Malfunction	Refer to DTC B2790: ID BOX EEPROM Malfunction [10/2018 - ]
B279986	Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid	Refer to DTC B2799-86: Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [10/2018 - ]
B279A12	Engine Immobiliser System Circuit Short to Battery	Refer to DTC B279A-12: Engine Immobiliser System Circuit Short to Battery [10/2018 - ]
B279C95	Engine Immobiliser System Incorrect Assembly	Refer to DTC B279C-95: Engine Immobiliser System Incorrect Assembly [10/2018 - ]
B27A5	Open in Front Floor Electrical Key Oscillator Circuit	Refer to DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [10/2018 - ]
B27A6	Open in Rear Floor Electrical Key Oscillator Circuit	Refer to DTC B27A6: Open in Rear Floor Electrical Key Oscillator Circuit [10/2018 - 08/2021]
B27A7	Open in Inside Luggage Compartment Electrical Key Oscillator Circuit	Refer to DTC B27A7: Open in Inside Luggage Compartment Electrical Key Oscillator Circuit [10/2018 - ]
U0140	Lost Communication with Body Control Module	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]
U0142	Lost Communication with Body Control Module "B"	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]
U0155	Lost Communication with Combination Meter	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]
U0230	Lost Communication with Rear Gate Module	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]
U0293	Lost Communication with Hybrid Vehicle Control System	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]
U1117	Lost Communication with Accessory Gateway	Refer to DTC U0140: Lost Communication with Body Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U0230: Lost Communication with Rear Gate Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway [10/2018 - ]