Engine fans running long after the car is shut off on 2001 Nissan Altima

My engine fans recently began running after the car has been shut off. Sometimes they don't start up till the car is shut off and they run for about a minute. Is this normal? It just recently started happening.

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2 answers
If it is hot outside someplace like Phoenix or Vegas then this not unusual. The fans are cooling the engine of the ambient air temp. If it is not too hot where you live then I woul get this checked
if it has a fan module control uinit as does the likes of Saturns L200 car it may be at fault if it does not shut off. In some cars if outside temps ARE high the fan will run until it reaches a pre temp to when it will shut off, thats normal.