Q: place battery poles on wrong side now get code1296 and vehicle idling high n low on 2003 Honda CR-V

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
vehicle starts good just idling high n low wen i drive its good only on idle, wat can i do to fix this problem thanks..
(1) Answer
1296 is either battery has recently been disconnected or driver side door open cant remember which,but nothing major......