O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 2)

What does this mean?

Code P0140 means the PCM detected no activity from the downstream O2 sensor on Bank 1.

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