Originally Posted by nickwe21.

In your case since you see the red flash, I think you just need to sync your key fob with the vehicle. Apparently when the batteries are out for too long the car doesn't recognize the key.

So per the instructions:

Put key in ignition but don't turn on.
Press Lock or Unlock on your key fob twice in a row THEN within 30 seconds turn your key to the on/run position.

That should re-sync the fob to your vehicle.

I have seen two different sets of instructions for this procedure...some say you need to have the key in the ignition for this to work other said you just point the key at your car and perform the "double press" then insert the key..might wanna try both.