BDX programmer tune and issue with DTC codes.

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RickyBobby713

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I have a BDX programmer with a Corsa exhaust with downpipe kit and AFE intake. All of the sudden my truck started throwing codes left and right. P0420, P0430, P05A1, P05B0 and U0420. Any thoughts? A few days ago I switched the custom tune back to stock and the codes started to appear after that. Today, I switched it back and they all popped up again. WTF?
 

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