The P0306 trouble code indicates a cylinder 6 misfire in your 2022 Lexus IS. This code is valid for IS models equipped with the 3.5L V6 engine, which includes the IS350 (all configurations) and IS300 AWD.
2022 Lexus IS Engine Configurations
Understanding which engine your IS has is crucial for proper diagnosis:
- IS350: 3.5L V6 (311 hp) - P0306 is valid
- IS300 AWD: 3.5L V6 (260 hp) - P0306 is valid
- IS300 RWD: 2.0L turbocharged 4-cylinder - P0306 would be anomalous
- IS500: 5.0L V8 (472 hp) - P0306 is valid
If you have the RWD IS300 with the turbo-4, a P0306 code requires investigation as that engine only has 4 cylinders.
Common Causes of Cylinder 6 Misfire
- Ignition Coil Failure: Individual coil-on-plug design can fail without warning
- Spark Plug Degradation: Worn electrodes or improper gap
- Fuel Injector Problems: Direct injection system issues or clogging
- Carbon Deposits: Intake valve carbon buildup from direct injection
- Vacuum Leaks: Intake manifold or gasket leaks
- Low Compression: Valve train or piston ring issues