Cadillac Deville P Codes (Powertrain) P1800 - P1899

I Got A Trouble Code "p1823 Internal Mode Switch Circuit P Low". Can Someone Please Tell Me What The Problem Is And What I Will Need To Do...

Hi, My 2001 Cadillac Deville Failed Inspection In Massachusetts And The Code Was P1823. Which Part Will I Need To Fix This Problem...

I Recently Bought A 2001 Deville With 173k Miles, And I'm Willing To Buy The Parts Needed, But I Need To Do The Work Myself. I Have 5 Codes...

I Have A 2000 Cadillac Deville And Today Got A Diagnostic Reading With The Codes P1860, 741, 386..... Is There Anyway You Can Please Tell...