[Joefas]

Hello my name is Joe and I own a 2013 ford Taurus limited 3.5l v6. I had a po420 code pop up . I replaced 2 downstream sensors and light came back on along with po430. I then replaced both cats and all new sensors . Good for a day and two codes back on . What should I try next ? Any help would be greatly appreciated

 

[Joefas]

Anyone think this could be the purge valve ?

 

[rjacket]

First hit on a google search of P0430:

 

[Joefas]

Yeah did that that’s the reasons I went through all 02 sensors and replaced cats , no exhaust leaks

 

[Joefas]

Thank you Rjacket Sorry just watched interesting. !!!! Thank you that helps I will definitely check it out.

 

[sheila]

First hit on a google search of P0430:

With a cracked manifold or faulty gasket, I wonder if the YouTuber also had p0171/174 lean codes?

 

[bepayne77]

Hello my name is Joe and I own a 2013 ford Taurus limited 3.5l v6. I had a po420 code pop up . I replaced 2 downstream sensors and light came back on along with po430. I then replaced both cats and all new sensors . Good for a day and two codes back on . What should I try next ? Any help would be greatly appreciated

Since you replace the downstream senors. Replace the upstream sensor. Usually if you replace either one upstream or downstream. Replace both.