A P0420 diagnostic code on your 2023 Honda HR-V indicates that the catalytic converter efficiency has dropped below acceptable levels. The completely redesigned 2023 HR-V features a new 2.0L 4-cylinder engine with updated exhaust components.
2023 HR-V Changes
The 2023 HR-V was completely redesigned with a new 2.0L naturally aspirated 4-cylinder engine (158 hp) replacing the previous 1.8L. The exhaust system is new but maintains a single-bank configuration.
P0420 on a New Vehicle
A 2023 HR-V showing P0420 is unusual since converters rarely fail this early. Likely causes include:
- O2 Sensor Issues: Faulty sensors creating false codes
- Exhaust Problem: Loose connections or manufacturing defect
- Software Calibration: ECM may need update
- Manufacturing Defect: Rare but possible
Warranty Coverage
A 2023 HR-V is fully covered under warranty. Have dealer diagnose at no cost.