[Steve pulls Tony up and leads him out of the elevator. The slight stagger does its job and he makes sure to keep hold of him, concerned that he might fall.]

Why didn't you just fix the doors?

[It's a gentle retort. Since Tony won't or can't fix the problem, Steve had to turn to different means.]

If we go to the source, will you fix the power there? You said we can't resolve things from here, but you can repair the damage done to the power lines, right?

[Obviously this means he's going to take Tony to the tunnels.]