Daniel Johnson gave them the lead with an 89th minute penalty but Coventry pegged them back with an equaliser from Jacob Tavares in the seventh minute of stoppage-time.
It was so frustrating for the Lilywhites, some of the added-one time due to two home fans running on the pitch between the award of the penalty and Johnson scoring it.
Here are the PNE player ratings from the game, with defender Sepp van den Berg taking the starman award for the visitors.
13. Bambo Diaby 6
The centre-half came on for his debut after PNE had taken the lead to help form a back three. Made a couple of clearances. Photo: Camerasport
14. Ryan Ledson 6
A stoppage-time sub in place of Archer, the midfielder didn’t have chance to impact the game. Photo: Camerasport
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