Is it necessary to replace the catalytic converter when the warning light comes on?
2 Answers
Replacement is required. It helps the vehicle's exhaust emissions meet standards more effectively. Below is relevant information about catalytic converters: Appearance: A catalytic converter looks like a metal can from the outside, but contains an internal 'substrate' for purifying exhaust gases. This honeycomb-shaped ceramic substrate is coated with a precious metal slurry, primarily composed of platinum, rhodium, and palladium. Exhaust purification function: The precious metals act as catalysts, reducing HC and CO in the exhaust into water and CO2, while breaking down NOx into nitrogen and oxygen. This is the exhaust purification function of a catalytic converter.
Last time my catalytic converter light came on, it was quite a hassle. The catalytic converter is a key component of the emissions system, and the light coming on doesn't necessarily mean it needs replacement—it could just be a sensor issue, like a faulty oxygen sensor or an air-fuel ratio imbalance. If the catalytic converter is aging and failing, it can indeed affect performance, such as sluggish acceleration, increased fuel consumption, or even causing emissions to exceed standards, which could impact your annual inspection. However, replacing a catalytic converter is expensive, often costing thousands. It's better to first have a repair shop read the fault codes to diagnose the issue. I've solved the light issue before by cleaning the sensors or fixing minor engine problems. Don't rush to replace it, but ignoring it could worsen the problem—if the converter gets clogged, it could damage the engine, leading to even higher repair costs. I recommend using an OBD scanner immediately to check, and if that doesn't help, visit a professional shop to assess whether a replacement is truly needed.
