Need help diagnosing a P0430 error code

[JFP in PA]

Two of the specific diagnostics steps in the decision tree for P0430 are to check the EVAP canister purge valve and the line connecting the EVAP canister purge valve and in intake system, as a problem with either will throw off the TWC conversion on bank 4-6. As you are showing a “fail” for the fuel tank ventilation system, which is the EVAP system, I’d start looking there.

[BoxsterSenior]

thom4782, The Durametric readings were taken only after about 20 miles of driving after the P0430 error code was cleared. I plan on driving the car a few more days and will check Ready Status readings again.

JFP in PA, Would it be possible for you to send me the diagnostic steps in the decision tree for the P0430 code? I believe there are some 'tests' in the Durametric program for the EVAP canister purge. I will have to take another look at that.
Any other suggestions?

Thanks