How to disable the fault light after removing the catalytic converter?

[StReed]

It converts harmful gases emitted by the engine into harmless carbon dioxide, nitrogen, and water, which are then directly expelled from the vehicle. When the catalytic converter warning light comes on, it indicates a malfunction in the vehicle's catalytic converter, requiring inspection and repair.

[VonNadia]

Back when I used to tinker with cars with friends, I also considered removing the catalytic converter for a thrill. The check engine light was annoying, so the workaround was plugging an O2 sensor simulator into the rear signal line to fake normal readings. But I strongly advise against doing this—it’s illegal, pollutes the environment, and risks your car being impounded for failing emissions tests or annual inspections. I’ve heard many cases where engines overheated and got damaged—hardly worth it. Before modifying, think about safety and responsibility. It’s better to consult a proper repair shop for a legal replacement part that ensures stable performance. I’ve seen similar cases where cars were totaled just to save a few bucks. Spending a bit more for professional service beats taking reckless risks—health matters more.