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How does software stop catalytic converters? The exhaust runs through it unless you remove them physically. They might be able to alter the O2 sensors but the catalytic converter works regardless.
 

downforce137

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How does software stop catalytic converters? The exhaust runs through it unless you remove them physically. They might be able to alter the O2 sensors but the catalytic converter works regardless.

I think that its eliminating the catalytic efficiency tests (downstream 02)that would throw a light if you removed the physical cat..
 
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