Okay, if anyone wants to know, 2020 F150 TPMS units are NOT compatible with a 2008 ford Expedition!!
I purchased four aftermarket valve stem mounting TPMS from Amazon and fitted them to my new wheels, it claims that the new TPMS work on 315MHz, but after fitting them, inflating the tyres and then putting my car into TPMS learning mode, I place the trigger tool by the front left wheel and the car fails to recognise the new TPMS unit!!
If I put my old wheel on the front left corner and go into learning mode, when I press the trigger tool, the car horn beeps and it asks me to trigger the front right wheel, so it recognizes the old TPMS units. I have tried all 4 new wheels in the front left corner, but my car will not recognise any of the 4 new TPMS. does anyone know if the 2008 ford expedition does use 315MHz or some other frequency and these units are not compatible with my car?
Thanks for any suggestions, the new units are chinese and are marked 0S04386BK-SZ.
Gary