Honda Accord P0420 code issue possibly related to catalytic converter at 85K miles on Honda Accord

Some Honda Accord owners report experiencing issues related to the P0420 trouble code, which typically indicates a malfunctioning catalytic converter. This problem can arise from various causes, including exhaust leaks, faulty oxygen sensors, or a clogged catalytic converter, leading to decreased fuel economy and increased emissions. Many owners find that addressing the P0420 code often requires replacing the catalytic converter and possibly the O2 sensor. However, it is crucial to accurately diagnose the issue before proceeding with repairs to confirm whether a catalytic converter replacement is necessary. Factors such as clogging or damage to the catalytic converter and incorrect readings from oxygen sensors can trigger the P0420 code. Therefore, it is advisable for owners to promptly address these catalytic converter-related issues to maintain their vehicle's performance and emissions efficiency.