Converter Warm-Up Test

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1997 GMC Savana Special, 1997 GMC Savana Camper Special, 1997 GMC Savana, 1997 Chevrolet RV Cutaway, and 1997 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle is in "closed loop" fuel control.
Commanded air/fuel ratio equals 14.7:1.
MAP sensor pressure is greater than 15 gm/s.
Predicted catalyst warm up temperature is greater than 842°F (450°C).