Cats are probably shot...

Joined
Nov 23, 2009
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Location
Suffolk County, NY
About 2 weeks ago I posted about a gross smell coming from the Trax. Thought it was bad gas. Well last night I got a p0420 code with no other symptoms. No drivability issues, no lack of power or idle issues... is it safe to say that one of the two cats is shot? I also heard it could be a cracked flex pipe which is common but it's the smell that came and went last week that is troubling me. Thanks!
 
O2 sensors going out are not uncommon on the Trax. I get intermittent CEL's with an P420 code, I have the GM sensors ready to install on my Trax when I get a chance.
 
That thread title had me ready to go to war. Then I realized it was in the Mechanical/Maintenance forum. 😅
Ya me to CAT not Cat :oops:
 

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