The P0306 diagnostic code on your 2024 Infiniti QX80 indicates a cylinder 6 misfire condition. The QX80's 5.6L V8 engine (VK56VD) produces 400 horsepower and has 8 cylinders, making this a valid diagnostic code requiring attention.
2024 QX80 V8 Powertrain
The 2024 Infiniti QX80 uses Nissan's proven 5.6L V8 with direct injection and VVEL (Variable Valve Event and Lift) technology. This sophisticated V8 delivers strong power and torque for the full-size luxury SUV. Note: Infiniti is releasing a redesigned QX80 for 2025 with a twin-turbo V6.
Common Causes of Cylinder 6 Misfire
- Ignition Coil Failure: Coil-on-plug degradation
- Spark Plug Wear: Worn electrodes or contamination
- Direct Injector Issues: Clogging or mechanical failure
- VVEL System Problems: Variable valve lift system malfunction
- Carbon Deposits: Intake valve buildup
- Vacuum Leaks: Intake system air leaks
- Mechanical Issues: Low compression from internal wear