Manifold means many and various. eg He had manifold failings - too numerous and varied to list. eg Nature in all its manifold splendour
There is a lot of danger there! What exactly do you mean? Danger to humans?
Do you mean intake manifold OR exhaust manifold. Need to know NEUTZ.
I think you mean dangerous. it means In danger (danger mean trouble or something like that/Peril)
danger
It means to take away from danger. For example, you would want to remove a small child from danger.
it is in danger
danger
Danger.
they mean there is danger ahead
It means having plenty of.
By "exhaust manifold sensor" do you mean the O2 or oxygen sensor? The only sensor I know of on a exaust manifold is the O2 sensor and if you follow the manifold you will see 2 sensors sticking out they will have (usually) green wires coming from them