Boiling Protection
WARNING: This page is about a different car, the 2008 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
In order to protect against thermal overload and along with criteria programmed in the ECM, the injection quantity is reduced as a function of the coolant temperature and vehicle speed. If the coolant temperature sensor fails the oil temperature signal from the oil sensor is used as a suitable value.