Here are what the codes mean:
PO1698 - No messages received from the electronic transmission control module or the Aisin transmission controller.
PO601 - Internal computer error!
PO500 - Have not heard from the speed sensor lately.
I would start by having the vehicle speed sensor replaced. It is much cheaper than the control module and chances are it is the problem.
Let me know what you find.
Saturday, August 15th, 2009 AT 10:53 PM