What P0430 Means on Your 2021 Ford Bronco Sport
The P0430 code on your 2021 Ford Bronco Sport indicates the powertrain control module has detected reduced catalytic converter efficiency on Bank 2. The 2021 Bronco Sport (not to be confused with the full-size Bronco) comes with either the 1.5L EcoBoost turbocharged three-cylinder (181 hp) or the 2.0L EcoBoost turbo four-cylinder (250 hp in the Badlands trim). Bank 2 refers to the ECU's secondary catalyst monitoring point in these inline engines.
At just a few years old, the 2021 Bronco Sport should not have a worn-out converter. Sensor issues and software calibration are the most probable causes, and the vehicle should be under warranty.
Symptoms You May Notice
- Check engine light illuminated
- Slight fuel economy decrease
- Possible faint exhaust odor
- No major drivability changes
- Emissions test failure
Common Causes on the 2021 Bronco Sport
- Faulty Downstream O2 Sensor — The most common cause on newer EcoBoost vehicles.
- ECU Software Issue — First-year model calibration may need updating.
- Exhaust Leak or Assembly Issue — A connection near the turbo or converter that was not properly sealed.
- Early Converter Wear — Very unlikely at this age unless the vehicle had unaddressed misfires.
Diagnosis Steps
Check warranty status (8 years/80,000 miles for emissions). The 2021 should be covered through 2029. Take it to the Ford dealer for free diagnosis. If checking yourself, scan all codes and note your engine type.
Repair Options and Costs
- Warranty Repair — Cost: $0. Covered through 2029.
- O2 Sensor — Parts: $50 to $150. Labor: $70 to $145. Total: $120 to $295.
- Exhaust Leak Repair — Parts: $15 to $80. Labor: $80 to $220. Total: $95 to $300.
- Catalytic Converter (1.5L) — OEM: $450 to $1,100. Aftermarket: $180 to $450. Labor: $120 to $260.
- Catalytic Converter (2.0L) — OEM: $550 to $1,300. Aftermarket: $220 to $550. Labor: $130 to $280.
DIY Feasibility
Under warranty, let the dealer handle it. O2 sensor replacement is straightforward on the Bronco Sport if out of warranty. Converter work should go to a professional shop.
Prevention Tips
- Follow Ford's maintenance schedule
- Use quality fuel for EcoBoost engines
- Address check engine lights promptly
- Keep up with oil changes, especially important for the three-cylinder turbo
- If you off-road, inspect the exhaust afterward