There are many aspects to cause the CEL on, one aspect is catalytic problem.
Our O2 CEL FIX(Mini Catalizador) actually has a miniature catalytic converter built inside(Europe 4) and will help get rid of that annoying check engine light you get after modifying your exhaust or removing your catalytic converter, and sometimes even when installing a high flow catalytic converter.
But 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!
So our CEL eliminator (someone call it Mini Catalizador) can not solve all the problem on CEL alert.
It can only solve one of the P0420 code--faulty catalytic converter (most common)

Introductions
Don'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.
This 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 post O2 sensor will see higher temperatures and greater flow of unburnt fuel.
As 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.

Symptom of P0420/P0042/P0430 Codes Faulty:
Uses an OBD-II scanner to retrieve trouble codes stored by the Powertrain Control Module (PCM). Faulty catalytic converter is the most common reason to cause fault codes P0420/P0042/P0430. There are 4 common indicators of faulty.
1. Check Engine Light is on.
2. Lack of power after vehicle warms up.
3. Speed of vehicle may not exceed 30-40 mph.
4. Rotten egg smell coming from the exhaust pipe.
Install our oxygen sensor adapter which includes mini converter could help solve the problem.

1. A worn-out oxygen sensor leads to excessive gasoline consumption, elevated exhaust emissions, and accelerated catalytic converter damage. Our Oxygen Sensor Replacement Kit addresses these issues, optimizing fuel efficiency and reducing emissions for a cleaner engine.
2. In regions with emission-regulating vehicle inspection programs, a faulty Check Engine Light (CEL) and O2 sensor can result in inspection failure. Our kit ensures compliance, allowing your vehicle to pass inspections seamlessly.
3. Our kit provides a practical solution to common fault codes such as P0420, P0042, and P0430, ensuring your vehicle operates smoothly and minimizing the risk of more significant problems.

Wide range of applications
The Mini Catalizador oxygen sensor extender is suitable for various types of vehicles, and most vehicles are designed for the M18x1.5 sensor hole.
Installation is simplified without modifications, cuts, or perforations. It only needs to be screwed onto the bracket, and no shaving or welding is required.

Perfect Polished Surface
The polished front surface can be perfectly maintained. Length: approximately 55 millimeters / 2.1 inches. Hexagon: approximately 22 millimeters / 0.8 inches. Inner thread size: M18 X 1.5.

High-Quality Material
It is made of high-quality stainless steel, ensuring maximum durability. Sturdy and durable, resistant to wear and tear. It possesses good abrasion resistance, high-temperature resistance, corrosion resistance, anti-aging properties, and a long lifespan.

Professional Craftsmanship
The thread is crafted using special tools, ensuring perfect precision and repeatability.

For “V”, “W” and boxer type engined vehicles, 2 Mini Catalizador may be required. Based on over 10,000 orders, straight angles sell more than 90-degree angles, which in turn sell more than 45-degree angles. Users typically buy two packs. If you're unsure, it's recommended to consult a professional automotive modification or repair shop for more specific advice.

Installation Steps:

• Jack up car if necessary, find extended bung which need to replace.
• Loosen old oxygen sensor spacer, bolt it on our new sensor spacer.
• Bolt new sensor spacer to pipe by hand firstly. Tighten with a wrench.
• Please click the link https://www.minicatalizador.com/pages/how-to-install to watch the installation video.

Note: Before installation, make sure all parts of the product are intact, and ensure that the top cover is tightly secured; otherwise, the cover may come loose and be lost.

This is a race-only product. It is not legal for sale or use on pollution-controlled vehicles that are driven on public streets, roads, or highways. Buyer's use or installation of this product for itself or for Buyer's customer is at Buyer's own risk. The Buyer is responsible for obeying federal, state, and local laws. Only Buyer can determine the end customer's use and thus assumes any and all liability, hereby waiving any and all claims against Minicatalizador.com in the sale of this product to the maximum extent permissible by law. Make sure to abide by all local, state, and federal laws, including emissions, vehicle safety, and traffic laws. It is Buyer's responsibility to know what those laws are and how they apply to Buyer or Buyer's customer. This product is designed and intended solely for legally-organized and sanctioned, closed-course, off-road competition use and is not for use on public streets, roads, or highways. This Product is capable of disabling the emissions system on some vehicles. Use on public streets, roads, or highways is a violation of federal and certain state (including California) and local environmental laws.