DTC P2A00-26: O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 Signal Rate of Change Below Threshold [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P0030-12.

Refer to DESCRIPTION , or refer to DTC P0030-12: HO2S Heater Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P0030-13: HO2S Heater Control Bank 1 Sensor 1 Circuit Open; DTC P101A-9E: A/F Sensor Heater Performance Bank 1 Sensor 1 Stuck On [08/2023 - ]

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P2A00-26	O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 Signal Rate of Change Below Threshold	The calculated value for the air fuel ratio sensor (sensor 1) response rate deterioration level is less than the threshold (2 trip detection logic).	Air fuel ratio sensor (sensor 1) Intake system Port fuel injector assembly Direct fuel injector assembly Fuel pressure (for low pressure) Fuel pressure (for high pressure) Fuel system EGR valve assembly ECM	Comes on	Engine	B	SAE Code: P2A00 DTC for Mexico Models: Applies (Mexico models only)