alternator light · battery light · charging system light
The battery is not being charged properly by the alternator - the car is running on stored battery power alone.
Turn off nonessential electronics (radio, AC, heated seats) and try to reach a repair shop or safe stopping point. Have the charging system tested - a multimeter check of voltage at the battery with the engine running is a quick first step.
Only briefly. The engine may stall without warning once the battery drains, and power steering/brakes can be affected in some vehicles. Avoid highways and long trips until this is fixed.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
This warning light sometimes appears alongside these symptoms:
Key Fob Battery Low Light
InfoThe battery inside the wireless key fob is running low, which can eventually affect remote locking, unlocking, or keyless start range.
Oil Pressure Warning Light
CriticalEngine oil pressure has dropped below a safe level, meaning moving parts inside the engine may not be getting enough lubrication.
Brake System Warning Light
CriticalThis red light points to a problem with the braking system itself - most often low brake fluid, but it can also mean a hydraulic fault or uneven brake pressure between circuits.
Coolant Temperature Warning Light
CriticalThe engine coolant temperature has climbed above the safe operating range - the engine is overheating.
Get the app, plug in an OBD2 adapter and ask Motoro AI what this code means. It checks your car live and tells you what to do next.
