Lincoln were minutes away from ending their seven-game winless run at Huddersfield, but conceded in stoppage-time to draw 2-2 and suffer more frustration.
The Imps have only won four of their nine home matches this season.
Reading just about held onto their place in the play-offs despite suffering a 3-0 home defeat to Blackpool last time out.
The Royals haven't lost consecutive games since September.