your brake pads are worn or there is trouble with the sensor for them.
its the warning light for the brake system
Without know what the warning light say's, all I can tell you in Yellow means caution.
It definately means you have bulb out...this just happened to me and my turn signal/brake light is out.
A Mitsubishi L200 yellow warning light on the dash could mean the ABS is having issues. It is best to check the owner manual for defined warning light meanings.
transmission control module
Caution or warning
It is the tire preasure light.
Hand brake warning light
Check engine
I have a warning light come on which is a circle with an excaimation point inside. What does it mean?
The warning light in the bottom area of your tachometer that looks like a circle ( gear ) with an exclamation mark in the middle is your " check transaxle " ( transmission ) warning light . If the light stays on take your vehicle in for servicing
It is your abs system (air bag system) warning light or it is your brake pad wear warning light (depends the year of your van).