P0430 on Your 2023 Ford Bronco
A P0430 code on the 2023 Ford Bronco means the ECU detected below-threshold catalytic converter efficiency on Bank 2. The 2023 Bronco offers the 2.3L EcoBoost turbo four-cylinder (275 hp) or the 2.7L EcoBoost twin-turbo V6 (310 hp), plus the Bronco Raptor with a 3.0L EcoBoost V6 (418 hp). On V6 models, Bank 2 is a distinct cylinder bank.
On a near-new off-roader, sensor issues and software calibration are far more likely than converter failure. Trail conditions can also create unique exhaust system challenges.
Symptoms You May Notice
- Check engine light on
- Minimal performance changes
- Slight fuel economy decrease
- Possible exhaust odor
- Emissions test failure
Common Causes on the 2023 Bronco
- Faulty O2 Sensor — Factory defects or off-road contamination from dust and water.
- Software Calibration Issue — Ford continuously updates EcoBoost calibrations.
- Exhaust Damage from Off-Roading — Rock strikes and trail impacts can affect exhaust connections.
- Catalytic Converter Issue — Very rare on a new vehicle.
Diagnosis and Repair
Your 2023 Bronco is under full warranty. Take it to the dealer. If you have been off-roading, inspect the exhaust for visible damage before your visit. Do not clear the code.
Cost Breakdown
- Warranty Repair — Cost: $0.
- O2 Sensor (theoretical) — $145 to $340 total.
- Exhaust Repair (if off-road damage) — $130 to $450 total.
- Catalytic Converter (theoretical) — $600 to $2,200 total depending on engine.
DIY Feasibility
Under warranty, let the dealer handle it. The Bronco's ground clearance provides excellent exhaust access for inspection, but warranty repairs should go through Ford.
Prevention Tips
- Inspect exhaust after off-road trips
- Install underbody protection for the catalytic converter area
- Avoid submerging the exhaust in water crossings
- Follow the severe-duty maintenance schedule
- Use quality fuel for EcoBoost performance