DTC P0101: Mass Air Flow Circuit Range / Performance Problem [11/2016 - ]: Description

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P0102 (Refer to DESCRIPTION ).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0101	Mass Air Flow Circuit Range / Performance Problem	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 0.83, 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 -4%, or higher than 20%	Mass air flow meter sub-assembly Intake system PCV hose connections EGR valve assembly	Comes on	DTC stored