What Does P0430 Mean on Your 2024 Hyundai Sonata?
Your 2024 Hyundai Sonata has set a P0430 code, indicating the catalytic converter on Bank 2 isn't meeting efficiency standards. The 2024 Sonata comes with a 2.5L 4-cylinder (Smartstream) producing 191 horsepower, or a 1.6L turbocharged 4-cylinder producing 180 HP in the hybrid. On these inline-four engines, Bank 2 refers to the secondary catalyst monitoring position.
As a brand-new vehicle, P0430 on the 2024 Sonata is almost certainly a minor issue. Let's walk through the details.
Symptoms You May Notice
- Check engine light on
- Possible slight fuel economy decrease
- Faint sulfur smell
- Minor hesitation
- Emissions test failure
Common Causes of P0430 on the 2024 Sonata
- ECM software calibration — New model year software refinements are the most likely fix.
- Defective downstream O2 sensor — A factory-defective sensor producing false readings.
- Exhaust assembly issue — A minor factory assembly concern.
- Catalytic converter manufacturing defect — Rare but possible.
How to Diagnose the Problem
- Have the dealer retrieve all DTCs
- Monitor O2 sensor data
- Check for Hyundai TSBs
- Inspect exhaust connections
- Verify ECM software is current
Repair Options
- ECM software update: $0 under warranty.
- O2 sensor replacement: $120–$280. Warranty-covered.
- Exhaust repair: $80–$260. Warranty-covered.
- Catalytic converter: $600–$1,400. Warranty-covered.
Cost Breakdown
- All repairs: $0 under warranty
- Out-of-warranty: O2 sensor $120–$280, converter $600–$1,400
Your 2024 Sonata is fully covered under Hyundai's 5-year/60,000-mile bumper-to-bumper warranty and the federal emissions warranty. All repairs should be free.
Prevention Tips
- Keep all scheduled service appointments
- Allow software updates at the dealer
- Use quality fuel
- Report unusual performance changes
- Follow the recommended maintenance schedule