Open Loop Operation

Engine is in Open Loop Operation mode whenever engine operating conditions do not meet programmed criteria for Closed Loop mode. At this time, air/fuel ratio is determined by engine operation rather than exhaust gas composition. Oxygen sensor data is not accepted in this mode. The following conditions keep the system in Open Loop:

• Engine Starting
• Engine Temperature Too Low
• Oxygen Sensor Temperature Too Low
• Engine at Idle Speed
• Wide Open Throttle Position
• Insufficient Battery Voltage