A P0304 diagnostic code on your 2022 Toyota Tacoma indicates the engine control module has detected repeated misfires in cylinder 4. The third-generation Tacoma offers four-cylinder and V6 options.
2022 Tacoma Engine Options
The 2022 Tacoma offers the 2.7L 2TR-FE four-cylinder (159 hp) or 3.5L 2GR-FKS V6 (278 hp). On the inline-4, cylinder 4 is rearmost. On the V6, cylinder 4 is on the rear bank.
Common Causes
- Ignition Coil Failure: Individual coil-on-plug failures
- Spark Plug Issues: V6 has D-4S requirements
- Fuel Injector Problems: Port injection on 2.7L, D-4S on V6
- Carbon Buildup: D-4S V6 helps prevent, 2.7L uses port injection
- Vacuum Leaks: Intake system integrity
Diagnostic Approach
Use Toyota diagnostics for detailed access. Identify your engine type first. The V6's D-4S helps prevent carbon issues. Test ignition components systematically.
Repair Solutions
Replace failed ignition coils with Denso OEM components. Install engine-appropriate spark plugs. Both engines are reliable with proper maintenance.