P0303 cylinder 3 misfire dealer said need new engine

The P0303 diagnostic trouble code indicates that the powertrain control module has detected a misfire in cylinder 3 of the engine

Lots of things can cause a P0303 If nothing seems obvious and there's no power loss, check the injector insulator, clear the code and see if it resets

p0303 38K miles and changing oil at 5K intervals , my check engine light came on and the OBD reported a P0303 that wouldn't clear

p0303 which is a crucial code associated with misfiring Some common factors that can trigger DTC P0303 include: Engine vacuum leak; Faulty fuel