Catalyst System Efficiency Below Threshold Bank 2
The catalytic converter on bank 2 is not operating efficiently.
Informational only. Consult a qualified mechanic.
- Worn catalytic converter
- Faulty downstream O2 sensor
- Engine misfire damage
Check O2 sensors first, then consider catalytic converter replacement.
What does P0430 mean?
The P0430 OBD-II diagnostic trouble code (DTC) indicates: catalyst system efficiency below threshold bank 2. This is a medium-severity powertrain code that your vehicle's onboard diagnostics system triggers when the catalytic converter on bank 2 is not operating efficiently. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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