DTC Set Conditions

Check conditions are when 30 seconds or more have passed since the starting sequence was completed, engine coolant temperature is more than 169°F (76°C), engine speed is at more than 1200 RPM, volumetric efficiency is more than 30 percent, and throttle position sensor output voltage is less than 4.3 volts. Check conditions are not met when fuel is being shut off. Monitoring time is 30 seconds. Judgment criteria is when heated oxygen sensor (front) output voltage does not get across 0.5 volt within about 30 seconds.