You will need to know what the codes specifically are first. Then you can attempt to fix it yourself if you are mechanically inclined. Because you mentioned them being air codes I would suggest you look at all of the vacuum lines for cracks, that may be the problem.
Yes it would be cheaper to use a self-employed mechanic if you know him well, but if you don't a certified mechanic would be better for peace of mind.
it will reset its self after 12 hours
Self complimentary codes are codes which after certain number of digits extends itself by taking the compliment of the previous digits.
You can on www.clubpenguin.com but the codes, you'll have to find out for your self. DaNiElLe x3
If you have an Autozone nearby, they will read codes for free.
The codes are numbers that you type in to get free stuff on the site.
the cheat code to it is work it your self
In Your Self-Destruction
a binary code is self complementary if complement of any code word is again a code .in self completing codes 9's complement of a number can be obtained by interchanging 0's and 1's.
it is in the tank if you can drop the tank your self than you should be able to do it your self.
you have to buy a doll like everyone else and get the code your self.
The operation itself has its own code.