Mass Air Flow (MAF) Circuit High Input

What does this mean?

Code P0103 indicates the PCM has detected an abnormally high voltage signal from the MAF sensor. This suggests the sensor is reporting more air flow than the engine can physically consume.

Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Lexus Nx models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.