C2021	Tire 1 air pressure decrease
C2022	Tire 2 air pressure decrease
C2023	Tire 3 air pressure decrease
C2024	Tire 4 air pressure decrease
C2221	Transmitter 1 pressure data abnormal
C2222	Transmitter 2 pressure data abnormal
C2223	Transmitter 3 pressure data abnormal
C2224	Transmitter 4 pressure data abnormal
C2321	Transmitter 1 function code abnormal
C2322	Transmitter 2 function code abnormal
C2323	Transmitter 3 function code abnormal
C2324	Transmitter 4 function code abnormal
C2421	Transmitter 1 battery voltage decrease
C2422	Transmitter 2 battery voltage decrease
C2423	Transmitter 3 battery voltage decrease
C2424	Transmitter 4 battery voltage decrease
C2521	Vehicle speed is abnormal
C2111	Transmitter ID1 Operation Stop
C2112	Transmitter ID2 Operation Stop
C2113	Transmitter ID3 Operation Stop
C2114	Transmitter ID4 Operation Stop
C2115	Transmitter ID5 Operation Stop
C2121	No Signal from Transmitter ID1 in Main Mode
C2122	No Signal from Transmitter ID2 in Main Mode
C2123	No Signal from Transmitter ID3 in Main Mode
C2124	No Signal from Transmitter ID4 in Main Mode
C2125	No Signal from Transmitter ID5 in Main Mode
C2126	Transmitter ID Check
C2141	Transmitter ID1 Error
C2142	Transmitter ID2 Error
C2143	Transmitter ID3 Error
C2144	Transmitter ID4 Error
C2145	Transmitter ID5 Error
C2171	Transmitter ID not Registered
C2176	Receiver Error
C2177	Initialization not Completed
C2179	Lost Communication (BERKES Communication)
C2181	Transmitter ID1 not Received (Test Mode DTC)
C2182	Transmitter ID2 not Received (Test Mode DTC)
C2183	Transmitter ID3 not Received (Test Mode DTC)
C2184	Transmitter ID4 not Received (Test Mode DTC)
C2185	Transmitter ID5 not Received (Test Mode DTC)
C2198	Reset Switch Error (Test Mode DTC)