Engine Cooling System LED in Yaris

[lijet]

Hi Friends,

I have Yaris 2008,

Since Y'day I have some error LED in the Dashboard "Engine Cooling System" ... (Attaching the screen short here with as well)

When I keep turn off my car for 3-4 hrs. I can not see this LED....but if I keep my car running for 1-2 hrs...i get the LED "Engine Cooling System" continues blinking & then AC stops cooling as well...(I check the AC fan it was working)

Kindly advice what & where I have to look for this issue...

While "Engine Cooling System" LED coming up ...Can I drive avoiding it for 4-5 hrs...or I must stop driving...

Awaiting for some helpful replies....

Thanks in advance...