Well I'm not familiar with accords, but hopefully this will help a little. . .
P0302:
http://www.engine-light-help.com/P03...ine-light.html
P1399:
http://www.2carpros.com/trouble_code...1300-P1399.htm
P1519:
http://www.civicforums.com/forums/17...t-failure.html
hope this gives a little insight to help with your problem. . .