DTC P0100-64: Mass or Volume Air Flow Sensor "A" Signal Plausibility Failure [10/2022 - 08/2023]: 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 P0100-12.

Refer to DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P0100-64	Mass or Volume Air Flow Sensor "A" Signal Plausibility Failure	All of the following conditions are met (2 trip detection logic). The engine is running. The engine coolant temperature is 70°C (158°F) or higher. The throttle position sensor voltage is 0.2 V or higher, and less than 2 V. Average engine load value ratio is less than 0.85, or higher than 1.15 (varies with estimated engine load). Average engine load value ratio = Average engine load based on mass air flow meter sub-assembly output / Average engine load estimated from driving conditions Average air fuel ratio is less than -15%, or higher than 15%.	Mass air flow meter sub-assembly Intake system PCV hose connections EGR valve assembly	Comes on	Engine	B	SAE Code: P0101 DTC for Mexico Models: Does not apply