Infiniti P0430 Error Code: How to Fix It

Q: Can I drive my Infiniti with a P0430 code?

Yes, you can drive short distances, but the vehicle will fail emissions testing and fuel economy may decrease. Continued driving with a failed catalytic converter can cause damage to other components and worsen the problem.

Q: How much does it cost to fix P0430 in an Infiniti?

Oxygen sensor replacement typically costs $200-400. If the catalytic converter needs replacement, expect $800-2000 depending on your Infiniti model and whether you choose OEM or aftermarket parts.

Q: What causes P0430 code in Infiniti vehicles?

Common causes include failed catalytic converter, faulty oxygen sensors, exhaust leaks, engine misfires, contaminated fuel, or oil burning issues. Age and high mileage are the most frequent factors in catalyst failure.

Q: Will P0430 clear itself in an Infiniti?

No, P0430 will not clear itself. The code will persist until the underlying problem is fixed and the codes are manually cleared with an OBD2 scanner. The check engine light will remain on until repairs are completed.

Q: Is P0430 the same as P0420 in Infiniti cars?

P0430 and P0420 are similar but affect different engine banks. P0420 is Bank 1 catalyst efficiency, while P0430 is Bank 2. The diagnostic and repair procedures are essentially the same, just on opposite sides of the engine.

Abstract

The P0430 error code in your Infiniti indicates that the catalytic converter on Bank 2 (the side of the engine opposite cylinder #1) is not working efficiently enough to meet emissions standards. This typically means the catalytic converter is failing, there's an oxygen sensor problem, or there's an exhaust leak affecting the system's ability to monitor catalyst performance.