When Monitored and Set Condition

When Monitored: The Powertrain Control Module (PCM) monitors the engine at operating temperature, in closed loop, engine load between 22-52%, the Three Way Catalytic (TWC) converter temperature is greater than 380°C (716°F), and no O2 Sensor or engine misfire faults.
Set Condition: The amplitude of the O2 Sensor Signal downstream of the TWC exceeds 75% of the amplitude of the O2 Sensor Signal upstream of the TWC for approximately 170 seconds.