You know, I bought a 2009 RXTis and had even less luck than you. I got about 100 yards offshore when it showed up.
Turns out the genius mechanic that prepped mine for delivery did not do the required removal of some shipping tie down and plates that held that cable from the factory.
They were supposed to remove that then reset the computer as the factory sends it with the maintenance light set to come on immediately if the dealer forgets to do the proper procedure which includes resetting that warning.
Sea Doo themselves told me this.