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Discussion Starter · #1 ·
I recently had that cats taken off my 2000 mustang. 4 days later the check engine light came on. Is there a sensor or sumthing after the cats that may be reading wrong? if so what can be done bout this?
 

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yes, there are O2 sensors that make sure the cats are working. you need either mil eliminators or you need a tuner to turn ther rear O2 sensor off
 

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Discussion Starter · #3 ·
what tuner or programmer are you talking about? or the mil eliminator. Could you post a link to it. What programmer is best all around and would eliminate this check engine problem. thanks bro!
 
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