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adaptive valves do not produce CEL's. all they do is have a mechanical spring mounted plate inside that resists the pulses of exhaust to even them out. This is especially useful for minimizing the difference between V4 and V6 mode.
There's nothing about them that would trigger a CEL. They're back near the muffler. There are no sensors, no electronics, nothing that would lead to an issue with O2 etc readings.
Edit: on the V6 camaro.
Most people who are having issues with aftermarket exhausts are playing with catbacks that may or may not be deleting the secondary cats at the same time. This can lead to issues where the primary cat doesn't heat up fast enough and potentially lead to CEL's. But if all you're doing is cutting off the adaptive valves. You will be fine.
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