When your 2022 Toyota RAV4 displays the P0304 code, the powertrain control module has identified consistent misfires in cylinder 4. The 5th generation RAV4 offers conventional and hybrid powertrains.
2022 RAV4 Engine Options
The 2022 RAV4 offers the 2.5L Dynamic Force (203 hp), 2.5L hybrid (219 hp), or Prime PHEV (302 hp). Cylinder 4 is the rearmost on all inline-4 configurations.
Typical Causes
- Ignition Coil Problems: Coil-on-plug failures
- Spark Plug Condition: D-4S specific requirements
- Fuel Injector Issues: Dual injection system
- Hybrid Operation: Engine cycling affects diagnosis
- Carbon Accumulation: Less common with D-4S
Diagnostic Process
Use Toyota diagnostics for detailed access. Identify your powertrain type. Monitor misfire counts during hybrid operation. Test ignition components systematically.
Repair Recommendations
Replace faulty ignition coils with Denso parts. Install properly specified spark plugs. D-4S system is reliable.