Low Coolant Level
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The low coolant warning indicator, located in the degas bottle, illuminates when a low coolant level is detected. The SJB receives the information from the low coolant level switch and sends the instrument cluster a message over the communication network to turn on the low coolant warning indicator.