Two Sergio Aguero goals within the last ten minutes had turned an exhilarating game on its head – and looked set to earn city triumph – when Cenk Tosun had given the Eagles a first-half lead.
But it had been Palace who had the ultimate word when Wilfried Zaha scarf down the left and put in a low cross that Fernandinho reached before Connor Wickham, solely to divert the ball into his own net.
The draw leaves champions city thirteen points behind Premier League leaders Liverpool, who have 2 games in hand and play Manchester United on Sunday.
For long stages it appeared city would end up empty-handed, as they struggled to break down a bright unionised Palace side.
Kevin de Bruyne had discharged a first-half free-kick against the side of the bar with the score at 0-0 however, for all the home side’s possession, they found clear-cut chances hard to come by.
Palace, meanwhile, had hardly ventured forward till they scored and their determined defensive outlook was so entrenched, the city fans booed James McArthur for time-wasting as he walked over to take the corner that led to their 1st goal.
When the ball did came in, Gary Cahill rose highest at the rear post and Tosun was unmarked to steer his knockdown into the corner.
That silenced an already subdued stadium, and there was a lot of frustration to come for the home fans after the break.
They thought their side had been handed a lifeline once referee Graham Scott pointed to the spot for a Jairo Riedewald handball, however the video assistant referee overruled his call once replays showed the ball came off the defender’s foot 1st as he blocked Joao Cancelo’s cross.
It took Aguero to lead the rescue mission, together with his 1st goal – his 250th for the club – returning when he turned home a Gabriel Jesus cross, before his second saw him expertly nod home a Benjamin Mendy delivery.
That should have settled the end result however Zaha had other ideas, making the foremost of some space down the left and causing in a dangerous delivery that Fernandinho could solely help home.