2005 Acura P0430: What It Means & Is It Safe to Drive?
P0430 on the 2005 Acura: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2005 Acura
- 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 2005 Acura, repairs for P0430 typically fall between $400 and $2400, depending on the root cause and labor rates in your area.
Known issues on Acura
Acura V6 J-series P0430 targets the bank 2 catalyst and commonly appears alongside P0420 on MDX and TL. Test the downstream bank 2 O2 sensor before condemning the converter—Acura J35/J37 downstream sensors degrade before the catalyst on many high-mileage examples.
Most commonly affected models
MDX 2007–2013TL 2004–2008RL 2005–2012