Check Charging System

[GeorgiaCanon]

My 2005 Explorer is giving a message " Check Charging System" upon acceleration. Drives fine and seems to be charging. No dead battery yet. Any ideas what could be causing this?

Thx in advance.

 

[rileyrs]

sounds like an alternator, you can get the battery and alt tested for free at napa and many others.
also, clean your battery terminals and cable ends,