P0420

[Twistedwithin]

So,on the way to work I get the great check engine light again. This time it p0420, which I'm assuming is the cat?, looking for advice on what to do with this,do I really need to replace the cat? Can I delete it ?, and if I delete it(no emissions where I'm at) will the check engine light be on forever?

 

[ADWarlock20]

It could be a cat starting to plug, a bad O2 sensor, etc. If your truck's fuel economy hasn't drastically dropped and isn't running rough, you can probably get away with just clearing the code for a while. It may be on the line of being out of tolerance and may even go away on its own. I dealt with that code on one of my previous vehicles for a couple years and never had an issue. I would clear the code and the code would come back every month or two.

 

[CorDog009]

Mine are free flowing and I only get a code maybe once a year. I used a couple of spark plug non-foulers on the rear o2 sensor to space it out of the direct flow.

 

[GTyankee]

P0420 Dodge Code - Catalyst System Efficiency Bank 1

P0420 Catalyst System Efficiency Below Threshold

How to diagnose, repair, and info on symptoms and causes of a P0420 engine code which means the catalytic converter is no longer performing at a normal level.

www.obd-codes.com

I found this site to be the most accurate