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I installed this last last weekend. Check engine light came on. Checked code it was for o2 sensors. I figured that problem out it was a tiny exhaust leak by turbo. Drove it prob 50 miles check engine light came back on. This time i read the code and it said this. Catalyst system efficency below threshold b1 b2. There was 2 codes thrown same on both. Not sure what the problem is. I was thinking i might need to get a custom tune because i installed the downpipe. Thoughts??
2012 F150 EcoBoost Lariat
2012 F150 EcoBoost Lariat