Audio car security code is locked

I have the same year car. Mechanics screwed up my radio when they disconnected the battery doing other work. Try this....put your key in the ignition and turn it to the "ACC" position so that the dashboard powers up, but don't actually turn the engine over. Then you wait. The car has to sit like this for 45 minutes to one hour uninterrupted, so bring a good book:) After the hour is up you should see the radio screen go blank. Once that happens, it should be reset so that when you turn it on you should get the "Code" message again. From there you get 3 new chances to re-enter your code correctly. This worked for me, it should for you too. Hopefully it will save you a costly trip to the dealership for such a simple fix. Good luck!