Drivable short-term, but fix now to avoid damage.
This code means the car's computer detected a fault in the wiring or signal for the alternator warning lamp (the "L" terminal circuit). It often points to a bad connection, a damaged wire, or a failing alternator voltage regulator. Repairs usually involve checking and fixing the wiring or replacing the alternator, and it's commonly fixable without major engine work.
$90 – $500
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it. If the alternator isn't charging, your battery will run down and leave you stranded. Get it checked promptly and avoid long drives until then.
If it's just a wiring or connection issue, repairs can run as low as $90 to $200. If the alternator needs replacing, expect closer to $350 to $500 including parts and labor.
It can be. It involves your charging system, and a failing alternator can leave you with a dead battery. It's worth addressing quickly to avoid being stranded.
It can, indirectly. If the underlying fault means the alternator isn't charging properly, the battery will slowly lose power. A quick charging-system test at a shop will confirm whether your alternator is doing its job.