low coolant light Buick century 2002

The lights stays "on" after start up, sometimes for a few minutes, sometimes
for over an hours. Coolant level ok in overflow tank,

I am assuming the sensor is b/o, but where it is located ? in the tank, in
the rad ??

Any other thing to check ? What is the value of a good sensor ( Ohms) Or
how can I make sure that its the sensor and not something else, eg wiring ?

Thanks

"Rick" wrote in message

> The lights stays "on" after start up, sometimes for a few minutes,
> sometimes for over an hours. Coolant level ok in overflow tank,
>
> I am assuming the sensor is b/o, but where it is located ? in the tank, in
> the rad ??
>
> Any other thing to check ? What is the value of a good sensor ( Ohms) Or
> how can I make sure that its the sensor and not something else, eg wiring
> ?
>
> Thanks
@#@
Get your ECM scanned only way to really tell.On newer cars that's your first
move.

Rey