What is engine fail safe mode on a 2005 ford explorer?

Engine fail-safe mode on a 2005 Ford Explorer is a protective feature designed to prevent further damage to the engine when a malfunction is detected. In this mode, the vehicle limits performance by reducing engine power and restricting certain functions, allowing the driver to maintain control and safely reach a service location. It is typically triggered by issues such as sensor failures or other critical engine problems, and the check engine light may illuminate to indicate the issue. To resolve the problem, a diagnostic scan is usually necessary to identify the underlying cause.