Air pressure sensor
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As far as the speedo, I installed a chip which you can set the new tire size and automaticly calibrates your speedo. When I did my lift and tires, the shop that did the work messed up one of my sensors and installed a new one. The computer still read that my sensors had a fault. Come to find out, there is a section in your owners manual that talks about retraining your tpms. You have to have a special training tool, which is supposidly a strong magnet, to retrain each sensor. I ended up taking my truck to the service department at my nearest ford dealer and they retrained the computer FREE of charge and only took about 5 min. May want to try and do the same. If not, ive looked up the training tools online and you can find them fairly cheap if really wanted one. Good luck