My nissan Altima 2011 is showing "KEY" on the dashboard and wont start

What is your question?

The battery is OK, the key symbol on the dashboard comes on and engine won't crank

What makes this problem better or worse?

If I disconnect the ECUs and reconnect them it picks in the time past.

How long has your 2011 Nissan Altima had this problem?

Less than a week now