Engine Codes..need Advise!!

[yourshdw]

HEY! I CHECKED THE CODES I GOT ON MY 93 SHO BUT I NEED TO KNOW WHAT I SHOULD DO!! HERE'S THE CODES I GOT:
116- ECT SENSOR OUT OF RANGE
136- O2 SENSOR NOT SWITCHING/SYSTEM LEAN LEFT OR FRONT 02
332- EGR DID NOT OPEN/RESPOND DURING TEST
543- FUEL PUMP RELAY OR BATTERY POWER FEED WAS OPEN, CIRCUIT SHOWS NO POWER

ANY SUGGESTIONS WOULD BE GREATLY APPRECIATED!!

BY THE WAY I AM MECHANICALLY INCLINED BUT JUST NOT FAMILIAR WITH SHO'S

 

[luigisho]

What are the symptoms of the car?