Catless Downpipe how to get rid of emission code

Marc C

Well-Known Member
26
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So I went from running a catted downpipe to a catless downpipe and I was wondering if there is cheaper solutions to get your car from throwing a emissions code other then flashpro. I was also wondering if there is any damage or anything else that would happen to the car if I would leave it like that for a little while.
 
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Try getting a defouler. What pipe are you running? The defouler will just move the secondary o2 sensor out of the direct stream so it measures some exhaust gasses and hopefully trick it into thinking that there is a cat in place. Unless the car is putting itself into limp mode, ignoring the code from the secondary sensor should not affect your car since the primary sensor before the cat is the one measuring air/fuel and is the important one.


Flashpro is a nice upgrade anyway and can take care of all the codes you might run into.



Here is a link to a universal defouler from ProCivic. You could call/email/shoot them a PM if you have more questions about the part fitting your car. It says it should just screw in.

http://www.procivic.com/pages-product_car_part_info/category-70_129/product-1032/index.html
 
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The catless versions aren't supposed to throw a code. What downpipe are you running?
 
I went from the ultimate racing high flow cated down pipe to the ultimate racing catless down pipe
 
Should have a defouler for the secondary o2 sensor and if I'm not mistaken I think you also have to disable it in flash pro if your not running a cat (could be wrong about that though).
 
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