They found the gas cap was missing. They put a new one on and hooked it up to the computer. I went to Costco where I had bought gas. Apparently they gave me my receipt though the passenger door and I drove off. The gave me a check for $115, the cost of a new cap and your connecting it to the computer. Though it was my fault, they compensated me anyway. It had been over a week so I really appreciate Costco. I always buy my gas there.