Does anyone know if I have to put a certain kind of coolant in my 2003 saturn ion?? ive already put coolant in the car but the coolant light keeps going on

your vehicle came with dex cool ---their are universal coolants also that can be used

If everything is working fine, except the light, its either a bad coolant sensor, loose sensor contact, or bad ground etc.

Borrow another scanner. It has to work. Go to you local auto parts store , they'll check it for free.

Sounds electrical.

Check the battery terminal connections first. Make sure that they are clean and tight. Most likely the issue

it has a coolant sensor in the reservor on the bottom maybe bad you can unhook it hook it back up still on replace it.

overfill tank

There should be a radiator cap as it controls what goes into the overfill tank. You might consider replacing it. If there are no leaks in the radiator or hoses, there are only 3 places the coolant can go (water pump leak, blown gasket, or out throught the radiator cap). Hope its the cap because that's the cheapest. Good luck!

radiator or top coolant hose. that is the only thing that it could be on that side.

let me know if you have more question. good luck

You need to replace your ignition switch. If it has already been replaced then you will prob. need a BCM.