I was able to program a new key for a 09 Avenger.The most difficult step was finding the key programming function.Once I found the programming function it was very easy.You will need the four digit pin.I was able to get it from the dealer.At first they wanted thirty dollars for the code but after explaining that the car was purchased used from their dealership with only one key they gave it to me for free.You will have to show proof of ownership.The key programming function is under the Body Module.
1 Connect to the ECM
2 Select Control Unit
3 Select Body Module
3 Select WCM /TPMS - Wireless Control that is where you will find key programming.