Does a Bad Catalytic Converter Increase Fuel Consumption?

[ClaraRose]

A faulty catalytic converter can indeed increase fuel consumption. Here's the relevant information: 1. If a vehicle's catalytic converter is damaged, it will affect the proper functioning of the oxygen sensor, causing the engine ECU to lose precise control over fuel injection. This leads to abnormal increases in fuel consumption along with reduced power output. 2. While catalytic converter damage can technically be repaired, the key consideration is whether the repair is cost-effective. Typically, when a catalytic converter shows signs of damage, both dealership service centers and independent repair shops will recommend replacement rather than repair.