It usually means that your alternator (or generator) is not charging the battery. At this point you need to check system voltage with a voltmeter when the engine is running. You should see at least 13.5 to 14.5 volts. If it is less than that, it is not charging. You can also have the charging checked at a repair shop if you don't have a voltmeter.
your Alternator
Usually when the battery light comes on its the Alternator, or a bad wire from Alternator to battery, but id check Alternator first.
Charging system problem. Normally this means there is a problem with the alternator.
i wish there was an answer here. this just has happened to me on my 2001 dodge neon. while i was driving the battery light flicked on and at the same time my power steering locked making it difficult to turn... i dont know what to do im still researching for answers.
Your alternator is not keeping the battery charged.
Depends on if it drained while you were driving or ran down while it was parked overnight. If the battery runs down while you're driving the vehicle then more than likely the alternator is defective. If the battery drains while the vehicle is parked then the problem is either a dead cell in the battery or a light is on somewhere on the vehicle. Could be a under hood light, trunk, glovebox, dome, or even the brake lights. It can also be a relay that is stuck.
Probably your battery cable or cables are loose on one end or the other.
If it won't crank, which is probably what you really have going on, it means your battery went bad while you were driving.
I had a 1999 Grand AM same thing happened to me. A while after that i was driving and the radio lost power, then the power steering. I had the alternator and battey replaced and that fixed the problem.
If your battery light is on while the car is running, it most like means your alternator is not putting out enough power and probably needs replacing.
battery light indication means a dead battery or a dead alternater/regulater or a fault in the charging/ignition system
Check all electric system, mainly alternator. Alternator's brush may be worn out.