See also:

Photosensors
Photosensors The mirror has a photosensor attached on both the front and back sides. If the glare from the headlights of vehicles behind you strikes the mirror, these sensors detect it an ...

Engine exhaust gas (carbon monoxide)
- Never inhale engine exhaust gas. Engine exhaust gas contains carbon monoxide, a colorless and odorless gas which is dangerous, or even lethal, if inhaled. - Always properly maintain the ...

If steam is coming from the engine compartment
Turn off the engine and get everyone away from the vehicle until it cools down. ...