Sorry to hear you're experiencing issues with your TiVo® and I would like to welcome you to the community.
Can I just confirm if you're still experiencing the same error code today after a mains reboot?
Also with it recording programs on its own this does sound like Suggestions are turned on so like coypu13 has advised that's the way to turn them off.
Looking forward to hearing from you
New around here? To find out more about the Community check out our Getting Started guide