DTC C2171/71 Transmitter ID not Registered in Main Mode: Description
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION CHART
DTC No.
DTC Detection Conditions
Trouble Areas
C2171/71
Transmitter ID code is not registered (when an ID code is unregistered for 51 minutes or more)