P0430 in my 3.5L

[kevingwin]

Got a 2015 w the 3.5L non turbocharged. About two months ago I got an evap code and the p0430 bank 2 code and replaced the canister purge valve. The evap code cleared and the 0430 stayed. Replaced the cat converter on bank 2 because the o2 sensors seemed to not be jumping all over w the obd2 data. Lights back on. Cannot figure out what it is, everything drives fine. Not that they are related but I bought a Dorman purge valve and it’s been clicking when I pop the hood, gonna throw a motorcraft one in. Any idea what my p0430 code could be now that the Cat on bank 2 is new?

 

[mguy13sport]

Swap the 02 sensors and see if it changes to Bank 1. My guess is the sensor is bad if the cat is new

 

[kevingwin]

Swap the 02 sensors and see if it changes to Bank 1. My guess is the sensor is bad if the cat is new

Thanks, I couldn’t swap because the electrical wiring wasn’t long enough. Just bought a new OE o2 sensor for bank 2, fingers crossed. Would a bad o2 sensor not throw its own code?

 

[kevingwin]

Swap the 02 sensors and see if it changes to Bank 1. My guess is the sensor is bad if the cat is new

Brand new sensor. Cleared the code and it came back I can read the voltage and it looks the same as the downstream on bank 1 as I’m driving. This is so frustrating

 

[RogueTuner]

I have been chasing this issue for a couple months now. 2 new cat manifolds 4 new O2 sensors. I have multiple exhaust leaks and now I suspect the cheap manifold gasket I used might need to be changed to the proper metal type. Anyone had a successful fix or know what else to look at? Can the mufflers be a problem also being over 130k miles and still original?

 

[Steve8316]

I have multiple exhaust leaks and now I suspect the cheap manifold gasket I used might need to be changed to the proper metal type.

Yes, cheap parts are rarely proper. Always use only proper parts.

Can the mufflers be a problem also being over 130k miles and still original?

Any part that needs to be changed at a time or mileage is listed in the maintenance schedule - the mufflers aren't, and can't cause any codes.

 

[RogueTuner]

Yes, cheap parts are rarely proper. Always use only proper parts.

Any part that needs to be changed at a time or mileage is listed in the maintenance schedule - the mufflers aren't, and can't cause any codes.

Thank you for the reply, I figured it was the case. Ordering the metal OE style gaskets today and have to get the exhaust leaks handled. I have a feeling the manifold is the leak since it is closest to the O2 sensors