O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)

What does this mean?

Code P0139 means the downstream O2 sensor on Bank 1 is switching too slowly.

Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Maserati Levante 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.