Quote:
Originally Posted by kielbasa16
I didnt get 1 CEL for the 2k miles or so I put on the HFCs before my UpRev tune. I think, but am not sure, that the tuners do something to eliminate warning lights from the O2 sensors.
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Yes, that's also another option if you're going to get a dyno tune. They basically program it so that the ECU ignores the O2 sensor input at the HFC so you won't get a CEL because of that anymore.