Monitor Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
If there is a defect in the mass air flow meter or an open or short circuit, the voltage level deviates from the normal operating range The ECM interprets this deviation as a malfunction in the mass airflow meter and sets a DTC.
Example
When the sensor output voltage remains less than 0 2 V, or more than 4 9 V, for more than 3 seconds, the ECM sets a DTC.
If the malfunction is not repaired successfully, a DTC is set 3 seconds after the engine is next started