The P0304 code in your 2022 Hyundai Tucson indicates the powertrain control module has detected persistent misfires in cylinder 4. As the first year of the fourth-generation redesign, understanding the new platform's engine options helps target diagnosis for effective repair.
Understanding P0304 in the 2022 Tucson
The redesigned 2022 Tucson introduced multiple powertrain options: the 2.5L Smartstream four-cylinder, 1.6L turbocharged hybrid, and plug-in hybrid variants. All engines position cylinder 4 at the rear of their inline-four configuration. The new platform features updated engine bay layout compared to previous generations.
New Platform Considerations
First-year production vehicles sometimes reveal unexpected issues. Monitor for technical service bulletins addressing any widespread concerns. The Smartstream engines incorporate advanced technology including continuously variable valve duration. Standard ignition and fuel causes remain the most common sources of P0304 codes.
Diagnostic Process
Identify your specific powertrain. Retrieve all codes including any first-year calibration-related faults. Familiarize yourself with the redesigned engine bay layout for cylinder 4 access. Test ignition coil and spark plug condition. Verify fuel injector operation. Check for manufacturer bulletins addressing P0304.
Repair Implementation
Use Hyundai-specified spark plugs for your engine type. Replace ignition coils showing degraded output. Address fuel system concerns. New vehicle warranty may cover first-year issues—consult dealer for concerns.