Alan Browne scored the winner, the PNE skipper netting from the penalty spot after Ched Evans had been fouled by Sky Blues goalkeeper Ben Wilson.
Victory ensured Championship football for North End next season, Frankie McAvoy's record in charge being three wins, two draws and one defeat.
These are the North End player ratings, Ched Evans and Browne the stand-out players.
1. Daniel Iversen 7
The North End goalkeeper didn't have a shot to save but commanded his penalty box well and displayed safe handling.
2. Jordan Storey 7
Played on the right hand side of the back three and helped restrict the Coventry attack to relatively few chances.
3. Liam Lindsay 7
Commanding at the heart of the back three, kept things straight forward.
4. Andrew Hughes 7
Another good display on the left side of the backline, made some timely interceptions and clearances.
Photo: Press Association