Jack Hughes gave the Devils a 1-0 lead with a power-play goal at 9:00 of the second period when he followed up a rebound just outside the left post.
"We're snapping the puck a little bit more, a little quicker, shooting more pucks, and recovering more pucks on the power play," he said. "It's much cleaner and crisper on the power play. We're tipping pucks and they're going into the back of the net."
Ehlers made it 1-1 at 16:47, skating over the blue line and into the left face-off circle before scoring on a wrist shot.
"Just overall, not good enough," Ehlers said. "Obviously, special teams wasn't there, both of them. Five-on-five, I think at times, we did a lot of really good things and got chances, and then there were times where we didn't do the right thing. They were able to skate around in our zone and get big chances.
"We're not happy with this one."