Stock cat delete cel?

[Caramanos2000]

Does anyone know if those 02 sensor spacers work to eliminate a cel if I delete the cat?

[SirDigby]

a secondary o2 simulator sends a signal to the ecu about once every second at the correct voltage for a clean catalyst. a spacer just moves the o2 sensor away from the path. I don't know why you'd do this. if you remove catalyst an incorrect signal will be sent to the ecu tripping a cel. you should not remove your catalyst unless you are using car for racing only. you will only gain about 1-2 hp, but can incur a $10,000 epa fine if it is discovered it has been removed. FEDERAL LAW (idk about PR)

[invader166]

a secondary o2 simulator sends a signal to the ecu about once every second at the correct voltage for a clean catalyst. a spacer just moves the o2 sensor away from the path. I don't know why you'd do this. if you remove catalyst an incorrect signal will be sent to the ecu tripping a cel. you should not remove your catalyst unless you are using car for racing only. you will only gain about 1-2 hp, but can incur a $10,000 epa fine if it is discovered it has been removed. FEDERAL LAW (idk about PR)

Agreed! If you do remove the cat, the only way to effectively get rid of a CEL, asside from using an aftermarket ECU, is to use a kit such as this:

http://www.magnumtuning.com/en/detail/ez-cel-fix-oxygen-sensor-simulator/toyota/yaris

A spacer could work, but there's really no guarantee.