It will be safe to drive short distance as long as the car does not over heat. You can top up the engine coolant or use water/coolant mixture till you fix the problem which could be leaking hose pipe. leaking radiator or faulty radiator cap
When the engine is cool
No , this coolant is coming from your heater core and you are losing engine coolant ; you need to have this repaired because the engine will overheat and suffer damage that will be more expensive than the repair of the heater core .
Coolant is used to keep an engine in a vehicle at a temperature safe for operation. If no coolant is in the reservoir, an engine will not start.
If only adding coolant to a leaking system it is safe because soon you will be forced to drain the coolant and fix a problem
Engine fail safe is on the 4.6 L V8 engine only - ( you have lost your coolant ! ) - find and then repair the cause of your coolant loss
Yes, IF the leak is not so severe as to overheat the engine. Any coolant leak needs to be repaired as soon as possible to prevent engine damage caused by overheating.
fail safe mode is for the 4.6 L V8 engine only - it means that you have lost your engine coolant - find the cause of the coolant leak and repair it , then refill your coolant system
No, you run the risk of destroying the motor.
I believe you have lost your engine coolant
On a Ford 4.6 liter V8 , engine fail safe cooling means that you have lost your engine coolant
I believe your engine coolant level is LOW
Depends on your definition of safe.