It means there is a problem with the charging system. Alternator is the likely culprit.
A failing alternator with sticky or worn out brushes.
They are run on the vehicles 12 volt dc electrical system.
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garry G&L AUTO REPAIR
There are several reasons why an AWD light comes on in a Buick Rendezvous. A few reasons could be burned oil, gear oil is hot, or even a burned out clutch.
the sensor is going out
As soon as the 2003 Buick Regal change oil light comes on, it is important to do so immediately. Not changing your oil can damage the motor in your car.
Until the red light comes on that is on front of the charger.
The low tire pressure light on a 2002 Buick Century is reset by pressing the red button in the passenger fuse box. The light will return if the pressure problem is not fixed or if the leak comes back.
The low traction light comes on in the 2003 Buick Century if the road is icy or if the road is wet. This is a warning light to let the driver know to slow down. If the light is coming on for no reason, the tires might be the problem. Bald tires can cause this light to come on.
You better check the computer code ASAP it may let you down on the road. Mine did.
Change your alternator