I'm no expert, but I don't think the PIC you are using has a Master Synchronous Serial Port (MSSP) module so doesn't actually support i2C communications. There are certainly no pins marked SCL and SDA in the datasheet
Juts checked here http://www.microchip.com/ParamChartS...?branchID=1005 and the PIC you are using has no i2c support
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