Code Enable Criteria

WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Engine is running.
Minimum intake air temperature is -40°F (-40°C) or more.
Engine Coolant Temperature is more than -40°F (-40°C).
Start-up coolant temperature is less than 104°F (40°C).
DTCs P0101, P0102, P0103, P0112, P0113, P0117, P0118, P1111, P1112, P1114, or P1115 are not set.

DTC sets when closed loop coolant temperature is not reached within a predetermined time. Maximum allowable time depends upon start up coolant temperature and amount of airflow into engine.