On my dash i have a symble that looks like(!)

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.

Inspect all of the tires for tread wear - if one is worn unevenly or more than the others, that may be the problem. Also, check the tire pressure on all of the tires - an underinflated tire would likewise generate this message.

Tip: to check the tread depth without searching for the wear bars, put a Lincoln penny edge-on into the tread, with the top of the head going in. If you can see all of Lincoln's scalp when looking straight along the edge of the tire, it's no longer safe in wet weather or legal.

what car we talking about ???old ones have only one cos its earthing through the switch ,,,,live goes through bulb in dash and earths through the switch

check pin conection at electronic control module ,the brain,use electric cleaner at pin conecters.

u have a computer controlled sensor working or reading out of normal range, need to go get a computer scan of failure codes, make sure u write them down if any transmission codes r present repair first engine codes then trans. codes

if you look under the wheelarch,above the front wheel,if you can see a strut surrounded by a spring,then you have both.(the damper is inside the strut)(ive put it this way so you can see for yourself.)NOW tyre wear,if your shockers have gone the wear pattern will be flat across the tyre tread/no tread/tread/no tread,and you will feel like you have square wheels.
to check shockers, push hard down on one corner,the car should bounce up,then down,then settle at its original height.no more.

you need to look in your owners manual,it will show you all dash lights.

Inspect your tires look at the tread, observe the wear across the tread, inspect the inner and outer side walls, look for bubbles, look at the rim look for damage. The more info you get the better.

95 bonny--1-turn ign switch off 2-using a fused jumper wire jumper data link connector #8 blk/wht wire to #4 blk wire (look under dash for dlc)
3-press unlock button on 1 transmitter doors should lock and unlock
4-repeat step 3 if doing more than 1 remote
5-remove fused jumper

for the 1993 car same way except jumper term a blk/wht
term g ppl/wht
have fun