High cable modem errors

High cable modem errors, uncorrectables in the tens of thousands, multiple code 16/24 messages, no T3 time outs as of yet, drop line was replaced a year ago ( I have some issues with how that was executed). I know that my current cable modem CM2500, is not recommended for the Gigabit plan I have, however, that would not cause the constant code 16/24 issues in the modem log. The cables in and under the house have been inspected and tested to be good,,,this leaves the possibility of Xfinity equipment or something else from the CMTS to the node just outside my house. Would it be asking too much to have someone check ( poll the CMTS ) to help narrow down the issue ,please.