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Old 01-12-2018, 03:54 PM   #1  
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midpipe o2 sensor cel

thinking of getting a BHR midpipe for my rebuild to go along with my turboxs catback and headers. Im wondering if anyone has come up with a way to trick the ECU so i dont get a MIL (CEL, the yellow light etc...) im the kind of person that gets annoyed by dash lights but i dont want a cat anymore.....any ideas?
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Old 01-12-2018, 04:52 PM   #2  
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The only certain way to avoid having a P0420 or P0139 using hardware is to have a cat. People talk about putting a spark plug anti fouler in but they don't really work on our cars. Sure, they get rid of the P0420 but they cause a P0139.

The only certain way to do it without having a cat is to use MazdaEdit, Versatuner or a Cobb Accessport to mask the code. Basically, makes the ECU ignore it.
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Old 01-14-2018, 09:46 AM   #3  
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Damn, alright I might just deal with it then thank you!
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Old 01-14-2018, 03:13 PM   #4  
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Well, the only cats that are proven to last are the HJS ones, but they cost a lot of money.

Either way, I'd make sure to read the codes once in a while if you just "deal with it". Don't just get used to the CEL and ignore an upcoming issue.
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Old 01-14-2018, 03:20 PM   #5  
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Yeah that's one of my top concerns I wouldn't know if there's a secondary problem but I have multiple scanners so it's wouldn't be difficult for me to check as regular maintenance
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