The P0303 diagnostic trouble code on your 2022 Volvo XC90 indicates the engine control module has detected consistent misfires in cylinder 3. The flagship SUV uses Volvo's modular 2.0L four-cylinder engines with various forced induction configurations.
XC90 Engine Options
The 2022 XC90 offers turbocharged (T5), turbo+supercharged (T6), and plug-in hybrid (T8) variants, all based on the 2.0L four-cylinder. Cylinder 3 is the third from the front on this inline-4.
Common Causes
- Ignition Coil Failure: Forced induction stresses ignition systems
- Spark Plug Issues: Turbo/supercharged engines require specific plugs
- Boost System Leaks: Multiple boost sources add leak potential
- Fuel Injector Problems: Direct injection deposits
- Supercharger Concerns: T6 models have additional components
Diagnostic Approach
Use Volvo VIDA or compatible diagnostics for detailed access. Monitor boost pressure and misfire counts. The T6's twin-charged system requires checking both turbo and supercharger systems.
Repair Solutions
Replace failed ignition coils with OEM components. Install Volvo-specified spark plugs. Repair boost system leaks. Address supercharger drive belt or clutch issues on T6 models.