Monitor Description
WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.
The ECM monitors the sensor voltage and uses this value to calculate the intake air temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the intake air temperature sensor (mass air flow meter sub-assembly) circuit, illuminates the MIL and stores a DTC.
Example:
If the intake air temperature sensor output voltage is less than 0.176 V*1 or 0.146 V*2 for 0.5 seconds or more, the ECM will illuminate the MIL and store this DTC.
- *1: except Mexico models
- *2: for Mexico models