The P0303 diagnostic trouble code on your 2022 Cadillac XT5 indicates the engine control module has detected consistent misfires in cylinder 3. The luxury crossover offers both four-cylinder and V6 powertrain options.
2022 XT5 Engine Options
The 2022 XT5 offers the 2.0L turbocharged four-cylinder (235 hp) or 3.6L V6 (310 hp). On the inline-4, cylinder 3 is third from the front. On the V6, cylinder 3 is on the driver's side bank.
Common Causes
- Ignition Coil Failure: Both engines use coil-on-plug ignition
- Spark Plug Issues: Turbo and V6 engines have different plug requirements
- Boost System Leaks: 2.0L turbo sensitive to intake leaks
- Fuel Injector Problems: Direct injection deposits
- Carbon Buildup: GDI technology leads to valve deposits
Diagnostic Approach
Identify your engine type first. Use GM diagnostic equipment for detailed access. Monitor misfire counts and boost data on turbo models. Test ignition components systematically.
Repair Solutions
Replace failed ignition coils with AC Delco components. Install engine-appropriate spark plugs. Repair boost leaks on turbo models. Address carbon buildup through professional cleaning.