Failsafe Mode is the same as Limp Mode. If the ECU is receiving mixed signals or no signals from a sensor the computer will revert to a low power mode to get you home without doing any damage. You need to get the ECU scanned to see what is wrong. If the engine is not overheating and you have good oil pressure drive it to the nearest professional. If it is overheating or you have no oil pressure have it towed.
ETC engine failsafe mode means that the rotations per minute of the engine are being limited. This is also known as limp mode.
You fail to list year, and engine size so I cannot provide an answer.
If the engine temperature gets too hot and the engine fail - safe cooling mode is activated the engine will eventually shut off
Check your engine coolant level at the reservoir ( do not take a radiator cap off until the engine is cool )
House of Payne - 2006 Epic Fail was released on: USA: 13 April 2011
Rachael Ray - 2006 No-Fail Gravy was released on: USA: 9 November 2012
Egr valve position incorrect
I think the quote is "by failing to plan, you're planning to fail" I could be wrong, and I think its by Abraham Lincoln, but I could be wrong. :]
Smosh - 2006 Mime Fail 7-4 was released on: USA: 27 January 2012
On a Ford 4.6 liter V8 , engine fail safe cooling means that you have lost your engine coolant
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