Quick check gauge... It looks like a big tire gauge and works much the same way. Autozone has one. Wish I could post pics on answers.com
Check your coolant level.
I'd check the coolant level first, then the thermostat.
That is referred to as "back dating" and it is illegal at the federal level.
You should check the fluid level in the power steering pump.
Check the brake fluid level. If it is ok, take it to a garage that can diagnoise ABS problems.
check refrigerant level. if is ok,, replace the low presion swicht locate on acumulator.
If coolant level is correct - could be a defective sensor
Check the refrigerant level first.
ABOVE YOUR POWER STEERING RACK LOCATED ON THE FIREWALL
To check the refrigerant level in your AC unit, you will need to hire a professional HVAC technician. They have the tools and expertise to properly measure and adjust the refrigerant levels in your system. It is important to have this done by a professional to ensure the proper functioning and efficiency of your AC unit.
The Transmission Fluid Check bolt is in the front right part of the Transmission Pan. This is in regards to a 1998 Chevy Cavalier (since I have one myself) and may not be correct for any other year. This bolt is just to check the fluid level is correct and will not drain the entire Transmission fluid reservoir, you must remove the pan to remove the transmission fluid.
The 2002 Chevy Cavalier has a sealed transmission. On the front of the transmission there is a 11mm bolt that sticks out from the side. Loosen it, if ATF comes out, it's full, if not, take that cap back off and add some more until it comes out of the check plug (it's very easy to miss! look carefully, driver side, 11mm bolt protruding from side)