Private Sales: Can You Take Back Property That Was Exchanged in a Bad Barter Deal

My question involves personal property located in the State of: California
I made a deal with a man who claimed to be an ex professional mechanic to fix my car in exchange for a horse trailer. The car was constantly overheating. He said the problem was head gaskets. He replaced the head gaskets and I gave him the trailer. The car continued to overheat. Do I have a right to get the trailer back?

Private Sales: Can You Take Back Property That Was Exchanged in a Bad Barter Deal