The P0303 diagnostic trouble code on your 2022 Buick Envision indicates the engine control module has detected consistent misfires in cylinder 3. The premium compact SUV uses a 2.0L turbocharged four-cylinder engine.
2.0L Turbo Engine Layout
The 2022 Envision's 2.0L turbocharged four-cylinder (LSY) produces 228 horsepower. Cylinder 3 is the third from the front on this inline-4 configuration. This engine features direct injection and turbocharging.
Common Causes
- Ignition Coil Failure: Turbo boost stresses ignition components
- Spark Plug Issues: Turbo engines require specific spark plugs
- Boost System Leaks: Intake and charge pipe leaks
- Fuel Injector Problems: Direct injection deposits or failures
- Carbon Buildup: GDI technology leads to valve deposits
Diagnostic Approach
Use a GM-compatible scanner for detailed diagnostics. Monitor boost pressure and misfire counts. Test ignition components through swap testing. Check for vacuum and boost leaks.
Repair Solutions
Replace failed ignition coils with AC Delco components. Install GM-specified spark plugs. Repair boost system leaks. Address carbon buildup through professional intake cleaning.