The CEL would not illuminate if the engine is running hot due to coolant losses. CEL is only for indicating a fault in the egine management system components.
When coolant loss is fast, the temperature gauge might not show the high temperature until it is too late as the temperatur sending unit works correctly only when it is immersed in coolant.
There is a possibility you have damaged the engine due to the overheating.
Tuesday, January 12th, 2010 AT 12:26 PM