Temp light illuminates,temp gauge at half way,car not overheating

If the coolant temp light is on then there is an issue. You don't say on what basis you believe the engine is not overheating but in any event take the car to a mechanic and get an independent temp gauge hooked up to the system to check coolant temperatures.

If the engine is in fact overheating, because the coolant temp is too hot, you will cause expensive engine damage if the cause is not identified and fixed.

If your coolant overflow is bubbling then regardless of what your gauge says you are having overheating issues. If your coolant is missing with no aparent leaks then you need to check your oil for a milky consistency and apearance which would most likely point to a blown head gasket. This would also explain overheating. Hope this helps

sensors wet or dirty .remove wires one at at a time and clean them .and clean the top of the sensors fuel is going rich .when doing this. and fowling the spark plugs.so clean them.

Sounds normal. If the gauge moved further over, it would indicate an overheating problem, wouldn't it? Check that engine is at normal operating temperature after it warms up. If it is running too cold, your thermostat might be stuck open.

This car has 2 separate temp sensors, 1 for the computer and 1for the gauge, you need to be sure the engine is not overheating first, but most likely it's a bad coolant temp sensor causing a false reading..

For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

You need to have it checked, because you will blow up your motor, if the exhaust is plugged.

If the temp gauge is reading normal, the lights are flashing, and the coolant level is full, the level sensor in the coolant bottle is the problem. I'm a service consultant for a Saturn dealer and I've run across this many times.

change the thermostat and the temp gauge in the radiator

As a safety measure, fit a new thermostat and senser. Then top up with antifreeze and water pertaining to where you are.