CHECK ENGINE LIGHT

What is your question?

I HAVE TWO PROBLEMS WITH MY JEEP LIBERTY, ONE BEING THE CHECK ENGINE LIGHT CAME ON FOUR TIMES, IT WOULD USUALLY STAY ON FOR A DAY OR TWO BUT NOW IT HAS BEEN ON FOR MORE THAN A WEEK. I HAD IT TESTED AND I WAS GIVEN A CODE WHICH I DON'T HAVE WITH ME AT THIS TIME BUT THEY TOLD ME IT WAS A OXYGEN LEAK OR SOMETHING LIKE THAT AND THE OTHER PROBLEM IS MY BACKLIGHT WHERE I CHANGE GEARS GOES OUT AND COMES ON, SOMETIMES IT STAYS OFF FOR A WHILE.