P0430 on FORD EXPLORER — Catalyst System Efficiency Below Threshold Bank 2

Q: "What does P0430 mean on a FORD EXPLORER?"

"P0430 indicates: Catalyst System Efficiency Below Threshold Bank 2. This is a emission controls code. 4 FORD EXPLORER owners have reported this to NHTSA."

Q: "What are the most common causes of P0430 on FORD EXPLORER?"

"Based on 4 NHTSA reports, the most commonly cited components are: Engine, Engine,Fuel/Propulsion System,Engine And Engine Cooling, Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P0430 serious on my FORD EXPLORER?"

"Of 4 NHTSA reports for this code on FORD EXPLORER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my FORD EXPLORER shows P0430?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0430 Means on Your FORD EXPLORER

P0430 is a diagnostic trouble code indicating: Catalyst System Efficiency Below Threshold Bank 2. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

4 FORD EXPLORER owners have reported this issue to NHTSA across model years 2015-2019. Most reports come from the 2018, 2015 model years. The most commonly reported component is Engine (50.0% of reports).

Real FORD EXPLORER Owner Reports

Source: NHTSA Complaints Database

"ENGINE LIGHT ACTIVATION code: P0430 Catalyst system efficiency below threshold Bank 2"

— 2015 FORD EXPLORER owner · ENGINE · Filed 01/30/2026

"On Thursday, June 14, 2025, the check engine light illuminated on my 2018 Ford Explorer, which has fewer than 75,000 miles. I promptly contacted my trusted local mechanic, Bananno Automotive, to schedule an oil change and requested that they also inspect and diagnose the cause of the warning light."

— 2018 FORD EXPLORER owner · ENGINE · Filed 06/23/2025

"Exhaust saftey issue / my cel came on leaving work on 9/25 , scaned code and got a code of p0430 (catalytic converter bank 2) i found a customer satisfaction program issued on 06/13/19 -(program #19m01) on this to replace under an extended warranty."

— 2018 FORD EXPLORER owner · ENGINE,FUEL/PROPULSION SYSTEM,ENGINE AND ENGINE COOLING · Filed 09/25/2023

"The catalytic converters for the Ford Explorer Utility Police Interceptor fail prematurely, degrading the emissions from the vehicle and causing the vehicle to fail emissions testing."

— 2019 FORD EXPLORER owner · FUEL/PROPULSION SYSTEM · Filed 10/23/2024

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'15

2

'18

1

'19

Common Causes on FORD EXPLORER

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 50%

ENGINE,FUEL/PROPULSION SYSTEM,ENGINE and ENGINE COOLING 25%

FUEL/PROPULSION SYSTEM 25%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0430 mean on a FORD EXPLORER? ▾

P0430 indicates: Catalyst System Efficiency Below Threshold Bank 2. This is a emission controls code. 4 FORD EXPLORER owners have reported this to NHTSA.

What are the most common causes of P0430 on FORD EXPLORER? ▾

Based on 4 NHTSA reports, the most commonly cited components are: Engine, Engine,Fuel/Propulsion System,Engine And Engine Cooling, Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P0430 serious on my FORD EXPLORER? ▾

Of 4 NHTSA reports for this code on FORD EXPLORER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my FORD EXPLORER shows P0430? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.