DTC C2171/71 Transmitter ID not Registered in Main Mode; DTC C2172/72 Transmitter ID not Registered in 2nd Mode: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The IDs of each tire pressure warning valve and transmitter are registered to the tire pressure warning ECU and receiver. When the ECU detects a transmitter ID code is not registered into the ECU, a DTC is output.
DTC DETECTING CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C2171/71 C2172/72 |
Transmitter ID code is not registered (When an ID code is unregistered for 3 minutes or more) | Tire pressure warning ECU and receiver |