Monitor Description
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
If there is a defect in the sensor or an open or short circuit, the voltage level will deviate outside the normal operating range. The ECM interprets this deviation as a defect in the MAF meter and sets a DTC
Example:
When the sensor voltage output is less than 0.2 V, or more than 4.9 V, and if either the condition continues for more than 3 seconds.