Drivable short-term, but fix now to avoid damage.
This code means the computer found a fault in the alternator field "F" control circuit, which controls how strongly the alternator charges. It usually points to damaged wiring, a poor connection, or a failing alternator or voltage regulator. Fixes typically involve repairing the circuit or replacing the alternator, and it's a manageable repair for most shops.
$100 – $550
Varies by vehicle and root cause.
For short trips, usually yes, but it's risky to ignore. If the charging system isn't working right, your battery can drain and leave you stuck. Have it checked as soon as you can.
A wiring or connector repair may cost $100 to $250. If the alternator itself is failing, replacement usually runs $350 to $550 with parts and labor.
Yes, it's worth taking seriously. It affects your charging system, and problems there can lead to a dead battery or a stalled car. Prompt diagnosis is the safest bet.
The field circuit is how the computer tells the alternator how hard to charge. When this circuit faults, the alternator can over- or undercharge, which is why fixing it protects your battery and electrical system.