t take a on using an extension only as often they do not work, this is a real mini Catalytic Converter built into it.This O2 cel fix actually has a miniature catalytic converter built inside and will help rid of that annoying check engine light you after modifying your exhaust or removing your catalytic converter, and sometimes even when installing a high flow catalytic converter.As a this will throw check engine lights (Cel, , ) typically the error codes will be P0420 ( System Efficiency Bank 1) and/or P0430 P0420 - System Efficiency Bank ).CEL Fix Check Engine Light Eliminator Adapter- O2 Sensor for auto. and .Type:O2 Oxygen Sensor AdapterSurface treatment: electronickellingThread: M18x1.5Length: 58mmFunction: check engine light fixColour: silverMaterial: metalSize: 58x16x25mmPackage Contents:1 x O2 Sensor Adapter ExtenderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia