Drive with caution — fix soon.
This code means the engine computer detected the system (battery) voltage rising above the normal operating range, often a sign of overcharging. It usually points to a faulty voltage regulator or alternator, a poor ground connection, or a wiring fault. It's commonly fixed by replacing the alternator or regulator and repairing any bad connections.
$150 – $650
Varies by vehicle and root cause.
For short distances usually, but high voltage can damage electronics and the battery over time. Limit driving and get the charging system checked promptly to avoid bigger repairs.
Most repairs run between $150 and $650. A wiring or ground fix is cheaper, while replacing the alternator or voltage regulator makes up most of the higher cost.
It's moderate but worth acting on. Overcharging can cook the battery and harm sensitive modules, so leaving it unfixed can turn into a more expensive problem.
It means the charging system is pushing out more voltage than the electronics are designed for, usually from a bad regulator or alternator. That excess can damage the battery and onboard computers.