Tank Mounting problems of the 2006 Toyota Scion Xb

Car was parked after being driven in normal conditions. When car was started, stability control, trac off and check engine light were lit. Took car to repair shop. Lights were reset, indications were there was a loose clamp. Two days later, the same thing happened. The mechanic stated there was a possibility I had gotten bad gas. Prior to all this, I had purchased a full tank of gas, but noticed as I was coming home from work after making the purchase that the car seemed "sluggish" at times, almost to the point of stalling out. It never stalled out. He suggested putting an additive in my fuel tank, reset the lights and I went on. The next day, the same thing happened. Went back to the mechanic. He did a deeper diagnosis. Again he stated the same 10 fuel-related codes came up. He stated I should go to the dealership to confirm the diagnosis of a canister problem. I went to the Toyota dealership. They confirmed that the evaporator canister was in need of replacement, as well as the fact I needed a new gas cap. I purchased a new gas cap, and am currently waiting for the evaporator canister to come in to get the car repaired. I am hoping it will be repaired 4/1/11.