A read-only WirelessGauge64 giving the cumulative count of errored codewords received on this head-end channel since the link was last administratively brought up, current as of this operational second. It is the channel-wide error counterpart to p2mpHe1SecTotalCodewords, letting an admin see per-second channel health at the head end rather than only at an individual subscriber unit. For example, a sudden second-by-second jump in p2mpHe1SecErroredCodewords across the whole channel, rather than just one subscriber's counters, would suggest a channel-wide interference event affecting all subscribers sharing that upstream frequency.