Drivable short-term, but fix now to avoid damage.
This code means the engine computer has found an electrical problem in the injector circuit for cylinder 2 specifically. It usually points to a damaged wire, a loose connector, or a failing injector on that cylinder. It's commonly fixable by repairing the wiring or replacing the one affected injector rather than major engine work.
$150 – $500
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it. If cylinder 2 is misfiring, driving for long can damage your catalytic converter, so get it diagnosed quickly.
A wiring or connector repair might cost around $150 to $250. Replacing the cylinder 2 injector typically runs $300 to $500 including parts and labor, depending on your vehicle.
It can be. A faulty injector circuit on cylinder 2 often causes a misfire, which wastes fuel and can harm the catalytic converter over time. It's worth addressing soon.
P0203 points to the injector circuit for cylinder 2. The exact location of cylinder 2 varies by engine, so a repair manual or technician can show you where it sits on your specific vehicle.