Drive with caution — fix soon.
This code means the computer detected an abnormally high voltage in the wiring or circuit that controls cylinder 4's fuel injector. It usually points to a wiring fault, a bad connector, or a failing injector that isn't switching on and off properly. It's often fixable by repairing the circuit or replacing the injector, without major engine work.
$120 – $450
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it. The affected cylinder may run poorly and cause rough idling or lost power. Have it checked soon to prevent further fuel system or engine damage.
Repairs typically range from about $120 to $450. A simple wiring or connector fix is on the lower end, while replacing the injector costs more, especially with diagnostic labor.
It's a moderate concern. The car will usually run, but a misfiring cylinder can hurt fuel economy and stress the engine. It's best to address it before the problem worsens.
It means the computer sees too much voltage in the injector control circuit, suggesting an open or shorted wire or a faulty injector. The injector may not be firing properly, so that cylinder isn't getting the right fuel.