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Exhaust problems

1257 Views 12 Replies 6 Participants Last post by  mschultz443
Took my 2017 charger hellcat into the Dodge dealership for a recall on O2 sensor. So they replaced both cats and sensors got my car back and sounds like the exhaust is muffled and not running right took it back to them with the same check engine light on and they said the sound could be the new cats puts on! (Catalytic) Answers please!!!!!
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Ok, but what did the CEL mean?
It "shouldn't", but........... Unless you have some before and after dyno runs.
What you mean when you say flash it?
Flash/Update, kind of like spindle/knuckle?
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