Check engine and screwdrivers light is on !

I have a mercury marquis 2005
the check engine light is on !
my problem is a when I drove my car in highway
for long time ( > 1 hour ) the car start to
1 - engine shaking.
2 - power loosing.
3 - engine want to power off.
4 - screwdrivers light turn on.

the part that I was change or clean it :

Sparks ( change )
injectors ( cleaned )
EGR ( cleaned )
Fuel filter ( cleaned )
Coil ( I was visit many technicians and all of them say the coil is right )
cleaning the throttle body

hint :
the technician check the trouble code and say :
you have a fuel level sensor low input.

any idea please