Whatever module set this code can't reach the engine computer over the CAN bus. Often pops alongside many other codes when there's a wiring or connector issue, a discharged battery, or a failed module. Cold-weather connectors and rodent damage 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.
