What does code P0430 mean on a Infiniti and is it safe to drive?
P0430: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means on your Infiniti, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Same as P0420 but for bank 2. The catalytic converter on bank 2 is not operating efficiently.
Common causes for your Infiniti
- Failed catalytic converter (bank 2)
- Faulty O2 sensor(s)
- Exhaust leak
Symptoms
- Check Engine Light
- May fail emissions
Typical fixes
- Replace bank 2 catalytic converter
- Replace oxygen sensors
- Repair exhaust leaks
Repair cost range
For a Infiniti, repairs for P0430 often fall between $400 and $2400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Infiniti
Infiniti VQ35/VQ37 engines frequently trigger P0430 alongside P0420. Both catalysts typically wear at similar rates; test both bank O2 sensors and consider replacing both converters if one is confirmed failed.
Most commonly affected models
G35 2003–2006G37 2008–2013FX35 2003–2008