your coolant sensor is very sensitive i would make sure that you don't have a small leak i have seen it in a Chevy pick up and the guy who owned it brought it in to the dealership three times to fix the same problem so be careful
The sensor may be defective/broken. I would have that checked or replaced.
Low coolant or bad sensor
The low coolant sensor is etiher plugded, broken, or your coolant is actually low. Check the radiator and resivor tank to see if they are full. If they are and the light is on, drain the coolant. Be careful not to break the plastic petcock. The sensor is located next to the battery on the right side of the car. Remove the battery and pull the sensor out. Clean it or replace it. then put everything back together.
You may need to add fluid to your cooling system. These lights are programed to alert you if the levels are low.
it comes on when you need gas
YOU WANT TO BE CAREFULL WHEN DRIVING W/ A COOLANT LIGHT ON THE BEST THING TO DO IS TO CHECK THE LEVEL OF COOLANT AND ADD IF NES. AND OF COARSE KEEP A GOOD EYE ON YOUR TEMP GAUGE..DO NOT OVERHEAT...
Could be the sensor that has gone bad if the coolant level is correct. Find a trustworthy mechanic to check that out.
Have vehicle scanned to determine the problem
Have vehicle scanned to determine problem
Because your bonnet's open!
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
That answer would depend on the meaning of the red light, i.e. the labelnext to it, or the message it's designed to convey when it illuminates.