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This O2 CEL (Oxygen Concentration Sensor Light) fixed device actually has an inherent micro-catalytic converter, which will help to avoid this trouble by checking the engine's light after changing its exhaust or removing its catalytic converter, sometimes even when installing a high-flow catalytic converter.
Don't just take advantage of it because it often doesn't work. This is a real micro-catalyst integrated into it.

The O2 sensor fix for this small cat will make your ECU believe that the catalyst converter hasn't been installed yet. When the catalyst converter is removed, the O2 sensor will see an increase in temperature and unburned fuel flow.

Weight: 72G
Line: M18×1.5
Color: Silver
Material: Metal

Package Contents:
1. Oxygen Sensor
Only the contents of the previous package are included, and other items are not.

Note: The light and different screens may cause a slight color difference in the article in the image. The allowed measurement error is +/-1-3 cm.