Moise Kean wasted several opportunities in a stalemate at Stade Pierre-Mauroy, where the champion ought to have consigned Lille to a first home defeat of the season in the top flight.
Kylian Mbappe was introduced just 13 minutes from time after being named as a substitute on his 22nd birthday and the striker did not have enough time to grab the winner.
The draw instead moved Lille back above Lyon at the summit on goal difference, with PSG only a point off the pace.
Thilo Kehrer headed just wide and Rafinha nodded Angel Di Maria's cross into the side-netting as PSG warmed to the task after a frantic start.
Idrissa Gueye came to the rescue with a great block after Kehrer gave the ball away inside his own penalty area as PSG tried to play out from the back, but Thomas Tuchel's men continued to pose a bigger threat.
Kean was denied by Mike Maignan when he tried to flick home a cross from Di Maria, whose dangerous free-kick was almost turned into his own net by Jose Fonte at the back post but Lille's goalkeeper made another save to keep his side on level terms.
Kean poked Layvin Kurzawa's inviting cross wide of the near post early in the second half and Yusuf Yazici strayed offside before he found the back of the net at the other end.
Di Maria was proving to be a real threat on his return to the starting line-up and his cross from the left flashed across the face of the goal as PSG continued to dominate with no reward.
Burak Yilmaz's long-range drive was tipped around the post by Keylor Navas before Mbappe was finally introduced just prior to Presnel Kimpembe making a brilliant last-ditch tackle when Lille hit PSG on the break.
Kimpembe limped off due to the damage done in that challenge and neither side could grab a late winner.