P0430Severity: Low
P0430 – Catalyst Efficiency Below Threshold (Bank 2)
The bank 2 catalytic converter efficiency is low.
What it means
Same condition as P0420 but for the second cylinder bank (bank 2). Common on V-type engines.
Symptoms
- Check-engine light
- Failed emissions test
- Slight power loss
Common causes
- Aged/faulty catalyst
- Faulty downstream O2 sensor
- Exhaust leak
- Burning oil/coolant
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Frequently asked questions
What does trouble code P0430 mean?
P0430 – Catalyst Efficiency Below Threshold (Bank 2). Same condition as P0420 but for the second cylinder bank (bank 2). Common on V-type engines.
Can I drive with a P0430 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.