The O2 CEL fixture has an integrated miniature catalytic converter that helps eliminate this by light inspection of the engine after exhaust changes or removal of the catalytic converter, and sometimes even when a high flux catalytic converter is installed annoying problem. Shouldn't take a just because length doesn't usually play a role, here's an actual integrated catalytic converter. This O2 CEL curing of small cats will make your ECU the catalytic converter is still installed. When it removes the catalytic converter the O2 sensor will see a rise in temperature and an increase in the flow of unburned fuel. For this reason, to see engine light (CEL ), typical error codes are P0420 ( for system efficiency bank 1 ) and/or P0430 P0420 ( for system efficiency bank 2 ), use off-road use Sensor Type: Magnetic Induction color:As shown Material:Stainless steel Package Contents: 1 x Oxygen sensor filter connector Adapter Only the above package content, other products are not included. Note: Light reflection 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.