2007 Chrysler Pt Cruiser

IWAS DRIVING AND ENTERING THE EXPRESSWAY FROM AN ON RAMP WHEN MY CHECK ENGINE LIGHT CAME ON AFTER I HEARD A DING SOUND. I TRIED TO EXCELLERATE AND COULD NOT GO OVER 20 MILES AN HOUR WITH OUT THE CAR SPUTTERING AS IF IT WAS NOT GETTING GAS. I DROVE TO THE NEAREST OFF RAMP AND PRECEDED TO A DEALERSHIP WHERE I HAD AN OIL CHANGE DONE ON THE SAME CAR A MONTH PRIOR. I HAD BOUGHT THE CAR USED FROM CARMAX JUST 4 MONTHS AGO AND IT ONLY HAD 44,000.THE TECH SAID IT WAS PROBABLY SOMETHING MINOR. WHEN HE CALLED TO TELL ME WHAT WAS WRONG IT WAS NOT MINOR. THE CAM AND CRANK POSITION SENSORS HAD GONE OUT. AT THE TUNE OF $491.00 TO FIX IT. I CALLED THE OPERATIONS MANAGER AT CARMAX AND ALL HE WANTED TO SAY WAS THANK GOODNESS I HAD BOUGHT THE EXTENDED WARRANTY SO IT WOULD ONLY BE $300.00 FOR THE DEDUCTIBLE. I SAW THAT THERE WERE OTHERS WITH THIS SAME PROBLEM. I HAVE HAD MORE PEOPLE TELL ME THAT THESE CARS (PT CRUISERS) HAVE MANY PROBLEMS AND THAT SOMETHING IS ALWAYS GOING WRONG WITH THEM. I WISH I HAD NEVER GOTTEN THIS TYPE OF VECHILE NOW!!! I AM STUCK WITH THIS CAR BECAUSE I CANNOT TRADE IT IN, I WOULD BE UPSIDE DOWN. HOPEFULLY I WILL NOT HAVE THE OIL PROBLEMS THAT ALL THE OTHERS HAVE HAD. IF I HAD KNOWN THEY WERE BUILT IN MEXICO I WOULD NOT HAVE EVEN THOUGHT ABOUT BUYING IT.