The P0303 diagnostic code on your 2023 Toyota Prius indicates that the engine control module has detected cylinder 3 misfires exceeding acceptable thresholds. The completely redesigned Prius features an all-new powertrain.
2023 Prius: Complete Redesign
The 2023 Toyota Prius debuts a new generation with a 2.0L four-cylinder hybrid system replacing the previous 1.8L. This represents the most significant Prius update in years.
2.0L Hybrid Engine
The new 2.0L delivers more power while maintaining excellent efficiency. With four cylinders, each contributes 25% of combustion power. Misfires significantly affect smooth operation.
Fifth-Generation Technology
The new platform brings improved performance and efficiency. The larger engine provides more responsive acceleration while the hybrid system maximizes fuel economy.
Warranty Coverage
Your 2023 Prius is protected by Toyota's comprehensive warranty including extended hybrid coverage. Misfire repairs should be covered.
New Platform Considerations
First-year models of redesigned vehicles may have isolated issues. Most are addressed under warranty. Contact your dealer for diagnosis.