A P0420 diagnostic code on your 2022 Honda CR-V indicates that the catalytic converter efficiency has fallen below the acceptable threshold. The ECM monitors converter performance by comparing upstream and downstream oxygen sensor readings, triggering this code when efficiency drops.
2022 CR-V Powertrain
The 2022 CR-V uses a 1.5L turbocharged 4-cylinder engine across all trims. This engine's exhaust system features a close-coupled catalytic converter designed to minimize cold-start emissions.
Common Causes of P0420
- Catalytic Converter Wear: Efficiency loss over time
- Oxygen Sensor Issues: Faulty upstream or downstream sensors
- Exhaust Leaks: Air entering system affecting readings
- Engine Issues: Misfires or fuel problems damaging converter
- Oil Contamination: 1.5T oil dilution can affect converter
- Fuel Contamination: Poor fuel quality degrading converter