LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2017 >> WRX Premium, Automatic CVT Trans >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Tire Pressure Monitor System (TPMS) DTCS
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Tire Pressure Monitor System (TPMS) DTCS

TIRE PRESSURE MONITOR SYSTEM (TPMS) DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTC Item Contents of diagnosis Remarks
C2021 Tire 1 Air Pressure Low (Normal Mode) Tire pressure of tire 1 is reduced. <Ref. to DTC C2021 TIRE 1 AIR PRESSURE LOW (NORMAL MODE) , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2022 Tire 2 Air Pressure Low (Normal Mode) Tire pressure of tire 2 is reduced. <Ref. to DTC C2022 TIRE 2 AIR PRESSURE LOW (NORMAL MODE) , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2023 Tire 3 Air Pressure Low (Normal Mode) Tire pressure of tire 3 is reduced. <Ref. to DTC C2023 TIRE 3 AIR PRESSURE LOW (NORMAL MODE) , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2024 Tire 4 Air Pressure Low (Normal Mode) Tire pressure of tire 4 is reduced. <Ref. to DTC C2024 TIRE 4 AIR PRESSURE LOW (NORMAL MODE) , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2121 Transmitter 1 No Data Data cannot be received from transmitter 1. <Ref. to DTC C2121 TRANSMITTER 1 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2122 Transmitter 2 No Data Data cannot be received from transmitter 2. <Ref. to DTC C2122 TRANSMITTER 2 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2123 Transmitter 3 No Data Data cannot be received from transmitter 3. <Ref. to DTC C2123 TRANSMITTER 3 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2124 Transmitter 4 No Data Data cannot be received from transmitter 4. <Ref. to DTC C2124 TRANSMITTER 4 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2221 Transmitter 1 Pressure Data Abnormal Transmitter 1 data contents are abnormal. <Ref. to DTC C2221 TRANSMITTER 1 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2222 Transmitter 2 Pressure Data Abnormal Transmitter 2 data contents are abnormal. <Ref. to DTC C2222 TRANSMITTER 2 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2223 Transmitter 3 Pressure Data Abnormal Transmitter 3 data contents are abnormal. <Ref. to DTC C2223 TRANSMITTER 3 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2224 Transmitter 4 Pressure Data Abnormal Transmitter 4 data contents are abnormal. <Ref. to DTC C2224 TRANSMITTER 4 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2321 Transmitter 1 Function Code Abnormal Function code has error. <Ref. to DTC C2321 TRANSMITTER 1 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2322 Transmitter 2 Function Code Abnormal Function code has error. <Ref. to DTC C2322 TRANSMITTER 2 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2323 Transmitter 3 Function Code Abnormal Function code has error. <Ref. to DTC C2323 TRANSMITTER 3 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2324 Transmitter 4 Function Code Abnormal Function code has error. <Ref. to DTC C2324 TRANSMITTER 4 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2421 Transmitter 1 Battery Voltage Low Transmitter battery voltage is low. <Ref. to DTC C2421 TRANSMITTER 1 BATTERY VOLTAGE LOW , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2422 Transmitter 2 Battery Voltage Low Transmitter battery voltage is low. <Ref. to DTC C2422 TRANSMITTER 2 BATTERY VOLTAGE LOW , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2423 Transmitter 3 Battery Voltage Low Transmitter battery voltage is low. <Ref. to DTC C2423 TRANSMITTER 3 BATTERY VOLTAGE LOW , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2424 Transmitter 4 Battery Voltage Low Transmitter battery voltage is low. <Ref. to DTC C2424 TRANSMITTER 4 BATTERY VOLTAGE LOW , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2521 Speed Abnormal Vehicle speed signal is not input to the control module when the vehicle speed is 6 km/h (3.7 MPH) or more. <Ref. to DTC C2521 SPEED ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>