Check DPS

Hi all, I have an outlander 800 xtp 2011 and when I go through a puddle at speed and it splashes up on to the quad I get the message "check dps " and my power stearing stops working. If I wait 5 minutes to let the water drain away and turn the bike off then back on it goes away and my power steering works again. It never comes on only when I get it wet, does anyone have any suggestions? Thanks