Alright so I bought a 03 Dodge Durango already some problems the key had been replaced well I lost the key that the person gave me which they had already replaced before I bought. I got a new key and ignition switch now I can crank it for just a few seconds then it shuts off. I need to know how I could bypass the security system in so it will stay running.

 

You need the correct key. We can't tell you how to bypass the security system. Gonna have to get it towed to the dealer, and let them address it. Then, get more than one key.....