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Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.The code P1093 in most cases set due to either a failing fuel injector(leaking) or a bad HO2S sensor or sensors with the sensors being the most common caused for the over rich code. To check it run the steps in the link below, copy and paste the link to your browser to open and view them.https://dl.dropboxusercontent.com/u/104923897/HO2S%20Ocr%2018.pdf
The one you want to change are the pre- cat sensors , there are the common ones to fail.