23 Ageing Of Oxygen Sensor After TWC, Bank 2: Function

The diagnosis function is responsible for checking the voltage position of the sensor after the catalytic converter. This happens in 2 areas:

1. After 5 seconds of the deceleration phase, the sensor voltage must be less than 0.1V.
2. If the sensor voltage remains above or below 0.6V for longer than 80 seconds, the mixture is made lean or enriched, the voltage must change.