A read-only WirelessGauge64 giving the cumulative count of errored codewords received on the head end from the subscriber unit identified by p2mpSuMacAddress, since that link was last administratively brought up, current as of this operational hour. Paired with p2mpTotalCodewords for the same subscriber unit, this lets the head end compute a per-remote-unit error rate, useful for identifying which specific subscriber on a shared upstream channel is the noisiest. For example, if one subscriber unit's p2mpErroredCodewords is disproportionately high compared to others sharing the same head-end channel, that unit specifically, rather than the channel as a whole, is likely the source of the problem.