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Hey guys,
I just recently got a CEL code PO136 and PO139, both o2 sensor readings. I have a catless turboback(PDE dp, cobbtuning catback).
What cel fix should I get to take care of these codes, and do the cel fixes prevent CEL light from coming on regardless of code?
In other words, I want to take care of the o2 sensor readings, but still want to be able to know if something else is wrong via CEL?
BTW, I thought PDE's DP had cel free guarantee???

Eric
 

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