What does code P0303 mean specifically?

Code P0303 means cylinder number 3 is misfiring, where the engine computer has detected that this specific cylinder is not firing properly. Common causes include a worn spark plug, a failing ignition coil, a clogged or leaking fuel injector, or low compression in cylinder 3. Symptoms include rough idling, hesitation, shaking, and reduced power. If your check engine light is flashing along with this code, stop driving promptly to avoid damaging the catalytic converter from unburned fuel. Because the code already identifies the cylinder, technicians can focus testing on that cylinder's ignition, fuel, and mechanical condition. At Motoro Cars in Miami, our ASE-certified, AAA-approved technicians use computerized diagnostics to confirm exactly why cylinder 3 is misfiring before replacing parts. Call Wynwood at (786) 634-2002 or Doral at (786) 633-3220 to get your P0303 misfire diagnosed and protect your engine.