GAC AND AION TPMS RELEARN PROCEDURE
A properly formatted scan tool is required to learn new sensor IDs when replacing sensors.
We highly recommend purchasing the AUTOMATE BLUETOOTH PROGRAMMER to ensure a successful activation of your device/s.
TIA troubleshooting tip:
The vehicle may enter your service facility with the OBDII fuse blown. If your scan tool issues communication error while writing sensor IDs, verify that this fuse is not blown.
During some types of service, the TPMS sensors may shut off resulting in a MIL when you start up the vehicle after service. The MIL will turn off during normal driving conditions, or you can perform an ID relearn using a properly formatted scan tool to turn the MIL off in the service bay.