Help getting rid of Permanent Code

[Overclock This]

Hi,

I have both P0420 and P0430 codes that are permanent. In the next couple of weeks I have to get my emissions test. I'm wondering how I can get these cleared. Currently my 2011 CTSV doesn't have any cats and one of the rear o2 sensors are unplugged because i'm using that bung for a wideband. All related codes are set to no error reported and I've turned off post cat, and catalyst tests and the codes never went away. I just turned the post cat and catalyst tests back on to see if I can get the codes to disappear, but no luck. I can get everything to ready status, but the permanent codes just won't clear.

Anyone have any luck with this?

[TheMechanic]

They don't do a visual check to see that you removed the cats?

[Overclock This]

They don't do a visual check to see that you removed the cats?

They may or may not physically have a look

[Maxspeed96ct]

did you try just doing a drive cycle? sometimes you need to put some miles on to delete a permanent code.

Also can try unplugging the battery overnight.

If that doesn't work something isn't set right in the tune

[mowton]

The only way to get rid of the Permanent Code is to re-initialize the test (and return the hardware to the stock scenario) that failed and successfully pass the entire embedded drive cycle.....

Ed M

[TheMechanic]

Do a search on "Monitors" You may have to go through a few but the info is there. Found it a month or so ago