Interior Minister Jose Serrano announced today via Twitter that the international police agency Interpol had issued an alert about the warrant.
Serrano did not offer any details about Mahuad's alleged crime or say when the warrant was issued.
Mahuad fled a 2000 coup and settled in the United States.
During a severe 1999 financial crisis he declared a bank holiday, freezing accounts and replacing Ecuador's sucre with the US dollar. Half of Ecuador's 42 banks shut down during the crisis.