Help with Error code P1636 - tried everything

I live in Canada on Vancouver Island. My mechanic and I do not know what to do to fix my Toyota First Generation Prius. Could you answer a question for us?
My Prius has only 150,000 Miles and it has been well maintained. I replaced the hybrid battery last year. After that, we replaced the Stator which had shorted out.
Since then, we keep getting the Error Code P1636 which means a communication error. We replaced the ECU and the hybrid computer...BUT STILL have the P1636 error code. The car is not drive able.
Our local Toyota dealer has very little experience with the first generation hybrids, and is no help to us.
What would you suggest we do?

Sincerely,
Janebg

 

Hi Bisco
I will go and find out more from my mechanic tomorrow. We have not had much success with our local Toyota Dealer. I live on Vancouver Island in Canada, and we don't think the local dealer has worked on many of these first generation hybrids. Thank you for the link. Sincerely, Jane