I HAVE A 2007 CHEVY IMPALA FLEX FUEL, MY ENGINE LIGHT HAS BEEN ON FOR SOME TIME. I GOT IT CHECKED AT AUTOZONE AND THE CODE READ P0449.HAS ANYONE HAD THIS PROBLEM AND FIXED IT, BECAUSE I DON'T WANT TO SPEND A LOT OF MONEY GOING TO DIFFERENT SHOPS GETTING IT TESTED TO SEE IF ITS ONE OR THE OTHER PROBLEMS THAT AUTOZONE HAS LISTED ON MY PRINT OUT THAT THEY GAVE ME. IF NOTHING ELSE, CAN SOMEONE SEND PHOTOS AND MUCH INFO THESE MALFUNCTIONS. IN DIRE NEED, BECAUSE I AM NEW AT THIS ON REPAIRING MY OWN VEHICLE, OR REFER ME TO GOOD MECHANIC IN THE HOUSTON, TX AREA THAT'S REASONABLE.