[SRT jones]

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!!!!!

 

[baabootoo]

Ok, but what did the CEL mean?

 

[SRT jones]

What you mean CEL?

 

[Frosty]

CEL = check engine light

Yes, replacement cats are different and could effect sound. The tune is different to after the reflash from that recall.

 

[SRT jones]

Yea it was a code on the CEL P4030. But it’s something wrong it feel like it’s a lost in take off and everything else has to be something wrong! Wasn’t running like this when I took it into the dealership

 

[SRT jones]

Well the effects on horse power? From 60+ when I stomp it just run like it’s lost power.

 

[baabootoo]

It "shouldn't", but........... Unless you have some before and after dyno runs.

 

[Cerino2000]

Maybe they forgot to flash it?

 

[SRT jones]

What you mean when you say flash it?

 

[Cerino2000]

Seems someone was saying after they put the new converters on they needed to reprogram the computer. if that is the case and they didn’t reprogram, maybe that’s the problem.

 

[baabootoo]

What you mean when you say flash it?

Flash/Update, kind of like spindle/knuckle?

 

[shademaker]

The code you posted is specific to the cats. However, being that everything just got swapped out, maybe they swapped in a bad o2? Things like that happen. I would think you would get other codes if it was the connection, typically voltage type alerts. Does the exhaust have a funky smell? If it feels like it lost power, you swapped the cats, I mean the list starts getting pretty short right?

You never know, parts get damaged all the time. Just because its new out of the box does not mean it can not have a issue. I would just take it back and have them pod it and watch the o2 sensor output. Might see one side not acting right.

 

[mschultz443]

Update tune accompanies cat replacement. It moves the cat overtemp protection to favor the cats more and make them last longer. Also tends to force rich condition to flush cats to cool them down when the temp threshold is reached.