We discovered the challenges of code P1450 just a few weeks ago, with another emissions related code, P2196, and drivability problems. The car would try to stall while in motion, my wife says it makes a groaning noise from the rear, but she could give it more gas to overcome the stall. The CEL light would come on.
I pulled the code, which according to various sources, is the vapor canister purge valve. Once I located it, looked pretty simple to replace. However, ours is a 2016 2.0 certified used with just 40k miles, so we gambled that either the powertrain or emissions warranty would cover it, and to it to the dealer.
They did not cover the repair, as it turns out, and we were shocked to face a $700 repair bill for what appeared to be a $35 part. As I learned, Ford no longer replaces just the valve but the valve, check valve, and the four tubes running to the other side of the engine. Some on this forum have likely experienced the joy of replacing those.
You can find just the valve on eBay by crossing the original valve's Bosch part number, 0280142519, but valve's Ford number shows discontinued in the Ford parts book, and the correct Ford part number for the entire assembly is F2GZ-9D289-A. I could find no aftermarket source.
For do it yourselfers, there are a couple of YouTube videos showing the assembly installed in a Fusion. The Fusion assembly appears to have one fewer connection, however.
Since we are just out of certified bumper-bumper warranty, we are talking with Ford customer relations to get at least part of the cost covered. I would like to understand why Ford no longer replaces just the valve, and why so many vacuum connections? Also, last year Ford recalled over a million Focus cars over a faulty purge valve. Sounds like they might have a problem with this part.