P0430Honda PilotYears: 1996 - 2026
Catalyst System Efficiency Below Threshold (Bank 2)
Reviewed by ASE Certified Technician
What does this mean?
Code P0430 is identical to P0420 but affects Bank 2 of the engine. The catalytic converter on Bank 2 is not cleaning exhaust gases effectively.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Honda Pilot models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Failing or clogged catalytic converter
Faulty oxygen (O2) sensor
Exhaust leak before oxygen sensor
Worn or fouled spark plugs
Clogged or faulty fuel injector
Symptoms to Watch For
- Check Engine Light is illuminated
- Rotten egg smell (sulfur) from exhaust
- Failed emissions test
- Decreased fuel economy