The P0302 code on your 2022 Toyota 4Runner signals that cylinder 2 is experiencing misfires. The 2022 4Runner continues with the proven 4.0L 1GR-FE V6 engine, making diagnosis similar to previous model years.
Cylinder 2 Location
On the 1GR-FE V6, cylinder 2 is located on the passenger side bank at the front position (closest to the radiator). The coil-on-plug design allows individual cylinder testing without extensive disassembly.
Likely Causes on 2022 Model
Though relatively new, the 2022 4Runner can experience cylinder 2 misfire from defective ignition coil (manufacturing variance), spark plug installation issues, fuel injector problems, or rarely, external contamination from off-road use.
Warranty Status
The 2022 4Runner may still be within the 3-year/36,000-mile basic warranty depending on purchase date and mileage. Powertrain warranty extends to 5 years/60,000 miles. Check warranty status before proceeding with self-diagnosis.
DIY vs. Dealer Diagnosis
If under warranty, having the dealer diagnose ensures coverage and proper documentation. If out of warranty, DIY diagnosis using the coil swap method is cost-effective for identifying the faulty component.