Emissions
Code P0430
Catalyst Efficiency Below Threshold Bank 2
Plain English Meaning:Catalytic converter not working efficiently
⚠️
Yellow: Drive with Caution
Expensive but not urgent short term
P0430 Symptoms
- •Check engine light emissions failure
Most Common Causes of P0430
1Bad catalytic converter O2 sensor issues
P0430 Repair Playbook
Required Mechanic Tests
A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:
Check O2 readings inspect exhaust
Typical Fix Paths & Estimated Costs
Replace converter $500–$2500
🛒
Parts for P0430 Repair
Common replacement parts for emissions codes. (Paid links)
🚗 Get Vehicle-Specific Search
Select your car to update the links above for a guaranteed fit.
Paid links — we may earn a commission. Please verify fitment details on the retailer site.
Fair Pricing Guides
Check our database for average parts, labor, and expected repair costs before heading to a mechanic.