DTC Set Conditions

Check conditions are where engine coolant temperature was 45°F (7°C) or more immediately before the engine was stopped at the last drive and engine coolant temperature was 45°F (7°C) or more when the engine started. Judgement criteria is where 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:

1. Intake air temperature is 140°F (60°C) or more.
2. Volume airflow sensor output frequency is 70 Hz or less.
3. During fuel shut-off operation.

The PCM monitors for this condition once during the drive cycle.