LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2015 >> Outback 2.5i >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Tire Pressure Monitoring System DTCS
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Tire Pressure Monitoring System DTCS

TIRE PRESSURE MONITORING SYSTEM DTCS DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC Item Description
C2021 Tire 1 Air Pressure Decrease <Ref. to DTC C2021 TIRE 1 AIR PRESSURE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2022 Tire 2 Air Pressure Decrease <Ref. to DTC C2022 TIRE 2 AIR PRESSURE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2023 Tire 3 Air Pressure Decrease <Ref. to DTC C2023 TIRE 3 AIR PRESSURE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2024 Tire 4 Air Pressure Decrease <Ref. to DTC C2024 TIRE 4 AIR PRESSURE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2121 Transmitter 1 No Data <Ref. to DTC C2121 TRANSMITTER 1 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2122 Transmitter 2 No Data <Ref. to DTC C2122 TRANSMITTER 2 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2123 Transmitter 3 No Data <Ref. to DTC C2123 TRANSMITTER 3 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2124 Transmitter 4 No Data <Ref. to DTC C2124 TRANSMITTER 4 NO DATA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2221 Transmitter 1 Pressure Data Abnormal <Ref. to DTC C2221 TRANSMITTER 1 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2222 Transmitter 2 Pressure Data Abnormal <Ref. to DTC C2222 TRANSMITTER 2 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2223 Transmitter 3 Pressure Data Abnormal <Ref. to DTC C2223 TRANSMITTER 3 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2224 Transmitter 4 Pressure Data Abnormal <Ref. to DTC C2224 TRANSMITTER 4 PRESSURE DATA ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2321 Transmitter 1 Function Code Abnormal <Ref. to DTC C2321 TRANSMITTER 1 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2322 Transmitter 2 Function Code Abnormal <Ref. to DTC C2322 TRANSMITTER 2 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2323 Transmitter 3 Function Code Abnormal <Ref. to DTC C2323 TRANSMITTER 3 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2324 Transmitter 4 Function Code Abnormal <Ref. to DTC C2324 TRANSMITTER 4 FUNCTION CODE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2421 Transmitter 1 Battery Voltage Decrease <Ref. to DTC C2421 TRANSMITTER 1 BATTERY VOLTAGE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2422 Transmitter 2 Battery Voltage Decrease <Ref. to DTC C2422 TRANSMITTER 2 BATTERY VOLTAGE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2423 Transmitter 3 Battery Voltage Decrease <Ref. to DTC C2423 TRANSMITTER 3 BATTERY VOLTAGE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2424 Transmitter 4 Battery Voltage Decrease <Ref. to DTC C2424 TRANSMITTER 4 BATTERY VOLTAGE DECREASE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C2521 Vehicle Speed Is Abnormal <Ref. to DTC C2521 VEHICLE SPEED IS ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).>