What I have is a 2000 IH with a T444E engine, the last eight of the VIN are 1H306887.
I checked with my IH dealership and they seemed to have run into a wall. Which is unusual, these guys in parts are good. If you happen to know the IH part number and would be willing to share and as a reward, I will name my next born after you.....
Is this the fire wall mounted one or the one in the intake tube? if its the one in the intake it is the same part as an exhaust back pressure sensor. they like the word transducer and try 1837012c1 if it is the one mounted in the intake tube in the valley.