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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-11-2016, 03:43 PM | #1 |
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P0420 Code... Need help
4 weeks ago, got a shop that installed for me a mxp headers,overpipe and catback. Now this P0420 code appeared. I dont want to go the dealership coz for sure they will void my warranty.... Need help!
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07-11-2016, 03:45 PM | #2 |
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Did you get a tune? Every stage 2 flash turns that off, and any custom tune should do so as well, as long as the tuner remembers to do it.
If you didn't get a tune with a catless header then A. you'll pop a code, and 2) you're missing out on a lot of power. |
07-11-2016, 04:12 PM | #3 | |
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Thank you! |
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07-11-2016, 04:15 PM | #4 | |
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Quote:
The light is a catalytic converter efficiency light. It measures both before and after the cat in the header. Since you've removed the cat from the header, the light will keep coming back until you get the car tuned. |
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07-11-2016, 04:18 PM | #5 | |
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Ty for your inputs sir! |
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