Hi.  My trac off and check engine lights would not stay off.  Service Department advised that the Codes that registered mean a cylinder head needs replaced.  I am, uh, in shell shock.  My first Corolla.  I thought I was set with dependability, longevity and all the Corolla represents.  I did buy it in September 2013, so it may have been early off the assembly line ?  Does anyone know what may have caused this?  I'm thinking a manufacturer's defect or something else in the car caused it to go bad.  There are 4 cylinder heads, and of course I have to wonder about the others.  It's under warranty, but I am thinking I may have had bad luck with this one.  Should I get rid of it? Thoughts, advice and Mechanical Knowledge 101 are appreciated. Thank you for reading this.