Well it started off being just P0141 (o2 sensor) and then before I could fix the O2 sensor, The codes P0420 and P0430 came up also. I replaced the O2 sensor and cleared all of the codes and a few key cycles later these two codes came right back.

The codes mean Catalyst System Low Efficiency Bank 1&2

What does it mean?
Will they go away by themself?
How can I keep them from coming up/ fix the Problem?

Thanks for all input.

 

P0420/P0430 are catalytic converter low efficiency codes.

Since you sig says "MAC ORY Pipe (catless)" I am assuming they are the cause of the issue.

Ryan

 

I never head these codes pop up until after I had the O2 sensor code.

the cats have been off for some time now.

 

P0141 is the post-cat drivers side 02 heater circuit, which one did you replace? Are you running sims?

 

that is the same sensor that I replaced.
not running sims.
the codes 0420 & 0430 didnt come up the same time that the o2 sensor code.
it came a few weeks later.
now only getting these to codes.

 

You don't have cats, so why would you even have the codes enabled? Turn them off. It's pretty standard to turn them off when you have a high flow cat anyways.

 

plus one......

 

Can I get the codes turned off anywhere for FREE?

and Where?

 

going to try to put cats back on to see if it fixes it