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Originally Posted by shifty
why would i need the O² simulators? can't the O² sensor input just be programmed out of the PCM when it's updated>?
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Exactly, that's all I was trying to clarify. The front O2 sensors are needed to monitor the A/F ratio. The rears are not needed as they are just for emissions. When you remove the cats you will need to delete the rear O2s from the PCM and your done - end of story.