I think you are referring to the Oil Pressure Gauge at the top of the dials and on the gauge with L and H either side. If this reaches H start to worry and Stop immediately
The AT dashboard light on the Mazda 6 means there is a problem with the transmission.
Explanation of 2003 Toyota Corolla Dashboard
the heat light is in reference to the cat convertor, if the heat light is on it means that the cat has over heated
That lights means that your coolant is low.
it means your low on radiator fluid
Have you checked the rear bulbs to see if they are out? If not then it is probably not what that means.
It means you have a light bulb burnt out somewhere.
It means you require a major service.
My understanding was that it had something to do with the O2 sensor not working properly.
It is important to know what the warning lights mean on a cars dashboard. The warning light that looks like an engine, is the Check engine light, it means there is a problem within the engine.
That warning light means a light bulb is out. Check all of your brake lights (including the brake light on the rear dash!)
It's no cage it means either low coolant or to have the coolant system checked