I have a 2003 Lincoln LS V8, today I got ETC engine failsafe mode. What is that?

SOURCE: 2002 LS: aHow do I fill radiator in my V8 Lincoln LS...

First- to drain ,you can reach the drain valve,from the pass side,if you lay on the ground and reach up to the radiator. You do not even have to raise the vehicle up
Second- mix Yellow GO5 Coolant about 50/50 or 60/40. Do not use Green in a Ford or Orange GM
To Fill- Remove the front two plastic screw type buttons,from the engine cover
-Remove the cover
The radiator cap is on the front of engine,on top,it is plastic
Remove cap and that is your fill point
Run engine to warm and get thermostat open,as you would with any vehicle
Top off coolant,replace cap
VERY IMPORTANT-next to the Power Brake Booster,and just under it,is a BLEEDER HOSE;to let air out of system. Turn screw slot ,only a little,DO NOT REMOVE SCREW. When coolant runs out close.
Fill-Degas Bottle,to full line,with coolant.
Check the next couple days on resevoir level ( Degas Bottle)

SOURCE: Lincoln LS 2003

my etc light came on and i took to the lincoln dealer it was my fuel system and it had to be replaced for the tune of 800 dollars. after that it ran fine for about a month then i hit a hump then it went into etc mode again. i then took it back to lincoln they did not see a code or that it even went into etc mode because i cut the car off and turned it back on it ran fine but once you cut it off it resets itself it did this about 10 more times and never came back on again knock on woods no problems but it started missing and the check engine light came on it was a misfire in cylinder 4 and it replaced the spark plug myself and it has ran find ever since. I was told anytime the etc light comes on it due to fuel or transmission

SOURCE: 2005 lincoln ls going into etc failsafe mode

I had to replace 4 different coils on my '02 LS before it finally stopped misfiring. After one code and coil replaced it would go to the next one. I had to replace them in this order, 2,3,7,8

When # 7 was misfiring it wouldn't even pull a code all of the time, the check engine light would come on one day then go off the next, really strange.

SOURCE: diagram for a 2000 lincoln ls V8

Your best ,to cut the old belt,to remove.

You can use a long handle 1/2" drive ratchet, on the belt tensioner.

The only pic is in the shop manual.

Wear long sleeves and arm protector sleeves on top. the fan housing is sharp and a tight fit. You will be there a couple hours.

Draw a picture before you start, and you won't need a diagram

SOURCE: 2003 Lincoln LS V8, Won't turn over after errors

Forget the four coils. That is a common problem,but I would question 4 failing.
The ABS ,Parking Brake,Speedo Etc,where nothing to worry about,you were loosing power, when it went to fail safe,so they came up.

ETC -is Electronic Throttle Control, your problem? Maybe
You will need to have a scanner put on it's,daignostic connector under the dash,to check for codes. Them only a trained technician can follow a chart or test proceedure to properly repair.
I have a 2004 LS,one of Ford most high tech and complicated vehicles.
Conclusion: only a professional can repair you car.
I would start with a local shop. If money you have money to throw away,go to a dealer.
Most likely have to wave to it on a flat bed carrier. Don't flat tow it.