What is code p0513 on a 2006 Dodge Caravan?

Incorrect vehical imobilizer code:

It means that the elctronic key in use is not talking to the computer correctly.

It may be as simple as the battery in the key is dead or it could be you need to buy and have a new key programed.

It is also remotely possible the computer box for this function has died. So a trip to a properly equeped repair shop is needed.

My local Retail Car Parts Store can sell and program a key to the vehical about $60.00 cheaper than the Dodge dealer.