DTC Set Conditions

Check conditions are when engine coolant temperature was 45°F (7°C) or more immediately before the engine was stopped at the last drive. Engine coolant temperature was 45°F (7°C) or more when the engine started. Judgement criteria is when engine coolant temperature fluctuates within 1.8°F (1°C) after 5 minutes have passed since the engine was started. However, time is not counted if any of the following conditions are met:

• Intake air temperature is 140°F (60°C) or more.
• Volume airflow sensor output frequency is 70 Hz or less.
• During fuel shut-off operation. Only one monitor during one drive cycle.