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P0420 and P0430 stock exhaust

Post questions about your Trinity for your Dodge/Jeep/Chrysler vehicles here.

Moderator: mikel

Post Sun Dec 18, 2016 4:50 am

Posts: 8
I'm wondering it my cats are plugged. I have a 2004 Dodge Hemi 3500 and need all the low end pulling power that I can get. Would Hi flow cats help? The Trinity tuner has helped a lot!!!!
Also, thermostat was stuck and I installed a new one. This truck need ps to last 2 more years? Any Ideas would be appreciated. Should I clean the PCV valve? I've read too much! Lol

Post Mon Dec 19, 2016 11:33 am

Posts: 54869
Location: DiabloSport World Headquarters

yes, if you are getting those codes with stock exhaust, I would guess your cats are clogged and replacing them would help quite a bit.
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST

Post Tue Dec 20, 2016 4:14 am

Posts: 8
I have the same issue with both a 420 and 430 code. Should we replace with cats or go without based on performance. I have a 3500 5.7 hemi and need all the low end torque possible. Also, where I live, there is no emission test.


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