A P0420 diagnostic code on your 2022 Honda Odyssey indicates that Bank 1's catalytic converter efficiency has dropped below acceptable levels. This minivan's 3.5L V6 features a dual-bank exhaust system with separate catalytic converters.
2022 Odyssey Exhaust Configuration
The 2022 Odyssey uses Honda's 3.5L V6 with 280 horsepower. The dual exhaust system means P0420 (Bank 1) and P0430 (Bank 2) are separate issues. Bank 1 is the rear cylinder bank near the firewall.
Common Causes
- Converter Degradation: Wear or contamination
- O2 Sensor Issues: Bank 1 sensor malfunction
- Exhaust Leaks: Air entering affecting readings
- Engine Problems: Misfires damaging converter
- VCM-Related: Oil consumption affecting converter
Warranty Note
A 2022 Odyssey should be under emissions warranty. Have dealer diagnose before paying for repairs.