It means that one of the emission system components is malfunctioning. Could be due to some of the following reasons: dirty or inoperative PCV valve - dirty oxygen sensor - your gas tank cap may be loose or the wrong type.
it turns into heat
You can observe colorful light emission in fireworks and in different sorts of chemicals as in Lithium it turns green when heated.
By omed, The mirror breaks and the light turns blue.
The blue light turns turqoise shining of the green object
that spot turns a orange
If they are connected in series if one light burns out, the whole string turns off.
it is because of this reflected light you can clearly see the moon
That was happening to my Ford Focus, turns out it was the alternator, i got it changed now it turns on...
if a light bulb is wired it lights if a motor is wired it turns
the whole spectrum turns red.
the light turns green because all the other colours of the spectrum are absorbed while the green is reflected
At least in the USA, a red light does not turn yellow. It turns green. A green light turns yellow, and then the yellow light turns red. IN THAT ORDER.