DTC P0234-00: Turbocharger/Supercharger "A" Overboost Condition [10/2022 - ]: Description

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P0234-00	Turbocharger/Supercharger "A" Overboost Condition	Either of the following conditions is met (1 trip detection logic): Boost pressure exceeds the threshold value (calculated from turbocharger speed upper limit value). Boost pressure exceeds the threshold value (calculated from compressor downstream temperature upper limit value).	Waste gate valve (turbine housing with valve sub-assembly) Waste gate valve actuator with bracket assembly Vacuum regulating valve assembly No. 2 turbo pressure sensor Mass air flow meter sub-assembly Wire harness or connector ECM	Does not come on	Engine	B	SAE Code: P0234 DTC for Mexico Models: Applies