2009 STS issues after Battery Change
 

After putting a new battery in, we started the car but all of the error messages for various sensors were cycling through on the Information Center but after 10 to 15 minutes all of this went away and the car drove back to normal again. After 2.days it came back so the dealer found a communication error and is not 100% sure what is causing it.
My question is if this is normal for the computer to do this as some sort of a learning curve once the battery has been changed or if this points to a serious problem with the car ?