This is due to a internal module problem with the back up power ,check that the connection is good remove and clean with contact cleaner ,still having issue then have a new module installed and programmed
This came from a Google search, worth checking all connections you can find under the bonnet, starting at the battery and work your way out from there.
Don't forget to check earth leads and connections
Also check the battery is strong, engine may start but volts could have dropped low when cranking the engine over and this could have flagged the fault code