Just installed new tires (from 265/60/18 to 265/50/20) on new rims (from 18" to 20") with new sensors (all OEM). I did the drive time/speed thing and 3 of my 4 relearned. The 4th will not (It's been a month now). Any tips on what needs to be done?

 

You might need to find someone with a TPMS programming and activation tool to try to wake the sensor up and confirm that the sensor is not dead.

-Rod

 

Is it possible that the brand new sensor is just bad? Do you have access to one of the old sensors from the old set of wheels?