THE YELLOW CHECK ENGINE LIGHT WAS ON SO I WENT TO THE MECHANIC AND THEY DID THE SCANNER OF THE ENGINE AND SAID THAT EVERYTHING WAS OKAY WITH THE ENGINE BUT THE MIXTURE WAS NOT MADE PROPERLY DUE TO FUEL ENJECTION SYSTEM SO THE LIGHT WAS ON , IS IT NECESSARY TO GET IT DONE RIGHT AWAY CAUSE THEY GAVE ME A ESTIMATE OF $ 500.