Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Toyota dealer immediately.


Stop the vehicle immediately.
Follow the correction procedures.Transmitter ID not Registered (C2171/71)
DESCRIPTION
Each tire pressure warning valve and transmitter ID is registered to the tire
pressure warning ECU.
When the ECU detects a transmitter ID code not registered in the ECU, a DTC is
output.
DTC No.
DTC Detection Condition
...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE FUEL SENDER GAUGE
2. SEPARATE FUEL SUCTION PLATE SUB-ASSEMBLY
(a) Disconnect the fuel pump connector from the fuel suction plate.
NOTICE:
Do not damage the wire harness.
...
Registration
REGISTRATION
CAUTION / NOTICE / HINT
NOTICE:
The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT:
The VIN is a 17-digit alphanumeric vehicle identification number. The Techstream
is required to register the VIN.
PROCEDU ...