Drivable short-term, but fix now to avoid damage.
This code means the computer detected a high voltage or open condition in the control circuit for the fuel injector on cylinder 2. It usually comes from a wiring break, a bad connector, or a failed injector that isn't responding correctly. It's often fixable by repairing the harness or replacing the injector, and fixing it restores proper fueling to that cylinder.
$150 – $500
Varies by vehicle and root cause.
For a short distance, usually yes, but don't make a habit of it. A cylinder that isn't fueling properly causes misfires and can damage the catalytic converter, so get it checked soon. If the engine shakes badly or the light flashes, have it towed instead.
Most repairs fall between $150 and $500. A simple wiring or connector repair is cheaper, while replacing the fuel injector raises the total, especially once labor is added.
It can be moderately serious. The affected cylinder misfires, which hurts performance and can damage the catalytic converter if ignored. It's not usually a breakdown emergency, but it deserves prompt attention.
Not always. P0266 points to a high or open circuit, which is often a wiring or connector problem rather than the injector itself. A technician will test the circuit and the injector to find the exact cause.