A communication-bus fault. One module on the CAN bus can't reach another. On modern vehicles every system from the gauge cluster to the ABS module talks over CAN, so these codes can light multiple warning lights at once. Voltage problems and rodent-damaged wiring are common Canadian causes.
Causes are listed roughly in order of how often they're seen on Canadian independent-shop tickets. Always confirm with a scan-tool freeze-frame and a circuit/sensor check before replacing parts.
