A bit error in a flit transmitted over a link is determined to affect one or more particular bits of the flit based on a syndrome value associated with a cyclic redundancy check (CRC) value of the flit. The link includes a plurality of lanes. It is determined that the one or more particular bits were sent over one or more particular lanes of the link. The bit error is associated with the one or more particular lanes based on determining that the affected bits were transmitted over the particular lanes.