What is an open loop fault?
What is an open loop fault? Open Loop - Fault is when both upstream oxygen or A/F sensors on a two bank vehicle have a fault. This could be caused by two bad upstream O2 sensors or both banks can be extremely rich or extremely lean. On a single bank vehicle Open - Loop Fault occurs when the upstream sensor has a fault. Is a car an open loop system? The controller is the cruise control, the plant is the car, and the system is the car and the cruise control. This type of controller is called an open-loop controller...