Exclamation light on inside board like this [!]

There is no warning light for catalytic converter heating uo. Brake light usually is a exclamation mark inside a circle inside parentheses. What you are describing sounds more like a temperature warning light for the cooling system.

That is the hand brake. it is on.

It's actually an exclamation point inside of a flat tire symbol. It's your auto sensor for the air in your tires indicating that they need air. Check the spare too as that tire is on the sensor as well.
Jeff

it is a tire pressue indicator kndly inflate ur car tires to proper pressure

If it looks like a deflating tire with an exclamation mark inside, its the check your tire pressure light.

If its a triangle with exclamation mark inside its the check engine light.

Tire pressure, check them all.

A yellow explanation point symbol on the dashboard typically applies to the Tire Pressure Monitoring system. A thick ! inside a half drawn flat tire symbol to be complete and comes in yellow color when lit. Under normal vehicle set-up, if this indicator stays lit after the power-on selftest, you need to check your tires for any uneven pressures and adjust their pressures to correct specifications. Okay? : )

A red exclamation point inside a circle when lit indicates your parking brake is on, or your brake fluid level is low.

red triangle with ! is the vehicle stability control not the ebattery prolly a bad sensor

my exclamation light turned on in my 05 nissan pathfinder what does this mean

This means you have a light buld not working some where in the front or rear lights.When you fix the problem the light will automaticy go out hope this helps.