O2 Sensor Spacer

When a high-flow catalytic converter or test pipe is installed on a late-model vehicle, a Check Engine Light (CEL) is often triggered due to a fault code indicating an inefficient catalytic converter. The CTS Turbo CEL Eliminator / O2 Sensor spacer is engineered to resolve this issue. It features a standard M18x1.5 thread, providing a universal fit for most O2 sensors. The intended installation is on the rear (downstream, post-catalytic converter) oxygen sensor to effectively eliminate the catalyst efficiency code. This product is recommended for vehicles with factory stock software. Emissions laws vary by location, and it is the owner's sole responsibility to ensure compliance with all local and federal laws regarding exhaust system modifications. Note that this part does not guarantee the CEL will turn off, and it is sold as a final sale with no returns accepted. The product is described as being effective on a variety of vehicles, but it may not work on all cars.