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Battery light on
High — fix right away
The battery symbol on the dashboard lights up while you drive. The car is running on the battery alone, and it may stop once the battery runs out.
Possible causes
- Failing alternator — Most likely · Codes: P0620P0562
Check first: Notice if the headlights dim or the light stays on while driving. The alternator may not be charging the battery. - Loose or corroded battery cables — Possible · Codes: P0562P0563
Check first: Look at the battery terminals. White or green crust, or cables you can wiggle, mean a bad connection. - Worn serpentine belt — Possible · Codes: P0620
Check first: Look at the belt that drives the alternator. Cracks or a glazed shine mean it may be slipping and not turning the alternator.
Questions, answered
What usually causes this?
The most likely causes are: Failing alternator; Loose or corroded battery cables; Worn serpentine belt. If you are not sure what is wrong, have it checked by a qualified technician.
Is it safe to drive with this symptom?
No — stop driving and get it checked. This symptom can mean a serious problem.
Not repair advice. If you are not sure what is wrong, have it checked by a qualified technician. Cars differ by make, model and year.
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