Oxygen O2 Sensor Spacer Adapter Bung Catalytic Converter Check Engine Light O2 Oxygen Sensor M18x1.5 Automobiles Sensors can only solve one of the P0420 codes - Fault Catalytic Converter (most common) 1. Threads are made with special tools for perfect precision and repeatability. 2. Simple structure, excellent material, not easy to deform or rust. 3. Universal accessories for most vehicles with M18 x 1.5 O2 sensor holes. 4. Made of high quality ,high strength and durable. 5. Simple installation, direct fixing bolts, no need to modify. What causes the CEL on xThere are many aspects to cause the CEL on, one aspect is catalytic problem. xAnd our CEL eliminator is one kind of small catalytic converter in front of the O2 sensor, so if your real catalytic converter is broken, the CEL eliminator can help you to reduce the toxic gas. xBut sometimes, the CEL alert is caused by O2 sensor problem. For example the O2 sensor is too sensitive, the CEL will still on after you load the eliminator. And still it will cause more Code error xSo our CEL eliminator (someone call it Mini cat) can not solve all the problem on CEL alert. xIt can only solve one of the P0420 code- faulty catalytic converter (most common) Introductions: xDon't take a chance on using an extension only as often they do not work, this is a real mini Catalytic Converter built into it. xThis O2 cel fix with miniature cat will trick your ECU into thinking the stock catalytic converter is still installed. When you remove your catalytic converter, your O2 sensor will see higher temperatures and greater flow of unburnt fuel. xAs a result this will throw check engine lights (Cel, SES, DTC) typically the error codes will be P0420 (Catalyst System Efficiency Below Threshold Bank 1) and/or P0430 P0420 - Catalyst System Efficiency Below Threshold Bank xFor OFF ROAD use only. Specifications: Material : Stainless Steel Weight: 44g Size: Approx.4.7x2.5x3cm / 1.85x0.98x1.18inches Thread: M18 X 1.5 Package: 1 Piece Package Included: 1 x O2 Sensor Spacer Adapter Notes: Notes: xPlease compare the details before you purchase. xProfessional installation or guidance is highly recommended if you have any difficulties in use. xDue to the lighting and screen settings, the real color may slightly different from the picture. xPlease allow slight size differences due to different manual measurement.