They'll do away with the sensors soon. They're starting to use the wheel speed sensors and new algorithms to give the computer the calculated pressure in each tire
It's cheaper for the manufacturers and easier on the dealerships since breaking them is a common occurrence
Leaking valve seals, worn camshaft or follower lobes or worn piston rings would cause a misfire. Can you post a video of the noise? Since you already ruled out fuel and spark, it's most likely mechanical
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