4LEGREG, you will need to take it in and have the computer reset by a dealer. I had the same problem and after replacing the battery, mine did the same thing. The dealer reset the computers for free.
Here's the deal, mine just crapped out again for the third time in five months. It originally happened on Thanksgiving weekend and I replaced the battery. It was the original, so I figured it would be dead. Put the new one in and all was fine for about three months. My wife got in it, started it and drove about five miles away and kaput, it wouldn't start again. I had the local Les Schwab deliver a batter and I installed and got the errors. Had wife take it to dealer and reset the codes and all was good.
Now this morning, she went to go start it and kaput, it's dead again. I had her put a charger on it at 2amp charge, but I'm curious on what could be causing the draw on it? We have keyless entry, but the black buttons haven't worked recently. Could it be the Comfort Control Module? What can cause these things to draw down like that so quickly? I'm very, very curious.
I'm having it taken to a local stealership tomorrow to have them diagnose it. I'm just curious on what to tell them to look for cause I'll bet they won't figure it out themselves. I have a full bumper to bumper extended warranty and I know it will cover everything on the vehicle. I have met the warranty rep, so I know if the company indicates they won't cover it, I'll complain right to the local representative.
Help!!!
Oh, and sorry to threadjack.
Oh, and to get the key to unlock, you will just need to hook it up to a charger to charge the system back up. I had my wife put a charger on ours and after charging at 2amps for about 5 minutes, it had enough juice to release the key.