What and why does the wrench li h t come on?

2006 Ford Explorer 4.0 v6 engine.

The light comes on when you first turn on the engine it stays on for maybe 4 four minutes and then it turns off. The explorer runs good I haven't noticed any changes or anything wrong with it what can be causing this wrench li h t to come on?

Hi it is the built in indicator of needing a service.

That light is usually maintenance light. It can be reset look in your owners manual or google it.

Overdue for a service

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