Like many posts on this topic, I've been fighting this for a few weeks and learned a lot. My Ranger is a '96 w/2.3L Many here have pointed to the vacuum hoses from the manifold to the canister for leaks. Several have pointed to the purge solenoid which was my initial problem and solved the problem for a couple months, it was stuck open. The new one eventually stuck open. I attributed this to the loose charcoal in the canister getting sucked up the line, I replaced the canister, cleaned the solenoid, it now works as it should. I cut open the old canister and for the life of me don't see how the charcoal pellets can get out of their containment but after they did I can see how they "could" get into the solenoid as a foam filter at the bottom had deteriorated. You can check this by putting a rod down the hose holes and feeling for a cushion at the bottom. Still fighting this code I replaced the purge sensor. The cross reference from the auto parts store shows a Standard Products CP416 as the replacement. I can tell you it is not. If you look through the vacuum hole on my original and compare it to the CP416 it is different and I now was getting a P1445 code. Took it back and exchanged it for a Wells brand PV342 which had the Ford logo and matching numbers.......exactly the same. The P1445 went away but I am still dealing with the P1443. Scratching my head and trying to keep my sanity, what next? I pulled the PV342, plugged the solenoid side and put the vacuum pump on the manifold side, pumped it to 25 in and it bleeds off to 0 in about 3 seconds. Checked the old one, it too leaks but at a much lower rate. I have a replacement on the way. So while my code at this point is inconclusive I would assume the the sensor should be sealed and as is giving me a false reading just like a split vacuum hose. I would suggest others having this problem test the components for leaks also. I'll keep you posted on results of the P1443 code.