My wife recently went to our dealer to have an engine light checked on our 2002 Subaru Forester. They found nothing and reset the codes. Shortly thereafter, I had trouble filling fuel tank resulting from a problem with the vapor recovery system. Prior to taking it back to the dealer, I checked near the right rear tire and found a lockwrench firmly attached to the EVAP canister hose. After its removal, the tank could be filled with no trouble, and the check engine light off. My question is why was a wrench attached to that hose, or am I just completely naive about trusting my dealership?