When your 2024 Volvo XC90 displays the P0303 code, the powertrain control module has identified consistent misfires in cylinder 3. The 2024 XC90 continues with refined versions of Volvo's modular 2.0L four-cylinder engines.
2024 XC90 Powertrains
The 2024 XC90 offers turbo (B5), turbo+supercharged (B6), and plug-in hybrid variants. The B-series engines add 48V mild hybrid assistance. Cylinder 3 is third from the front on all inline-4 configurations.
Typical Causes
- Ignition Coil Problems: Forced induction demands reliable ignition
- Spark Plug Condition: Twin-charged engines stress plugs
- Boost System Integrity: Multiple boost sources
- Fuel Injector Issues: Direct injection deposits
- 48V System Integration: Mild hybrid calibration
Diagnostic Process
Use Volvo VIDA or compatible diagnostics. Monitor boost and misfire data. The 48V system affects engine operation but shouldn't cause misfires directly. Check for TSBs.
Repair Recommendations
Replace faulty ignition coils with OEM parts. Install properly specified spark plugs. Repair boost leaks. Dealer service recommended for warranty coverage.