What does it mean when the A/T Communication Line is malfunctioned?

YaRi

New member
I have a Nissan Altima 2000 and I got a code saying A/T Communication line. Idk what that means and I cant find a mechanic that knows either. I want to find out so maybe I can explain to the mechanic what it is. PLease help me. I need my car fixed!
The code I believe its P1605. I looked up the code and i got A/T Communication Line. Idk what that means tho.
 
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