slinky

I have a 2006 Lexus GS300 - pretty sweet i might add but i'm getting a check VSC symbol. My gas cap even after a few clicks still isn't secure. Can someone post the Lexus Gas Cap Part #? I bought a regular one from AutoZone but it doesn't securly stay on either so i'd like to try the actual Lexus one. By the way unhooking the battery takes the Check VSC symbol off but the light comes back on for me after about 30 miles. Bummer because I need no lights on so i can get a smog check. Thanks in advance.