2011 TRD Sport 2wd DCLB 17" stock alloy wheels. I am only able to register 4 TPMS Sensors to the vehicle. I would like to add the spare, is this normal? The spare steel wheel had no sensor, I am replacing spare with stock alloy wheel with sensor. BTW it was local tire shop that had a hard time with their scanner/computor. Can the dealer do this?