2014 fiesta 1.6 P219A Code

2014 fiesta 1.6 non turbo here. And this P219A code will not go away.

I've replaced all of the spark plugs , upstream 02 sensor, and swapped fuel injectors with some used ones from the Junkyard (all oem parts) and the code still remains. It is very frustrating because I can't even complete all drive cycles/pass my smog out here in California. The car runs and idles great. I have no other engine codes.

Any suggestions are helpful. Thank you

IT may range from a simple exhaust manifold leak onto a timing of the cam advance solenoids problem - you'll need a better diagnostic tool to help with this. This may indicate an issue with lack of, or loss of, enough oil pressure in one of the advance cams that when the solenoid engages to let the oil flow in, it may not be able to push the cam advance far enough to reduce the O2 oxide emissions.

I take it this is an Automatic?

Yes. It is an automatic transmission.

If I had a timing or camshaft sensor issue, wouldn't I at least get a timing code or some other check engine light?

I will attempt the smoke test with my home made smoke tester next. Thank you

The faults will eventually set another check engine light for other issues of performance - but right now it may be as for a flimsy seal to the catalyst onto a failed catalyst or a mechanical issue of vacuum leaks (or plugging by foreign debris) forcing the system to enrich/lean the mixture beyond a norm it once had - onto the others being more mechanical assembly and age related illnesses of bad seals and dented broken hardware - losing the seals one part once had (like EGR valve... Because it is an automatic) - you can easily see why this needs a more detailed diagnosis on the system that it once had worked fine until some type of failure.