2020 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE

Tire Pressure Monitoring System DTCS

TIRE PRESSURE MONITORING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Reference
C2021 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2021 FL TIRE AIR PRESSURE DECREASE NORMAL MODE .
C2022 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2022 FR TIRE AIR PRESSURE DECREASE NORMAL MODE .
C2023 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2023 RR TIRE AIR PRESSURE DECREASE NORMAL MODE .
C2024 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2024 RL TIRE AIR PRESSURE DECREASE NORMAL MODE .
C2121 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2121 FL TRANSMITTER NO DATA .
C2122 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2122 FR TRANSMITTER NO DATA .
C2123 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2123 RR TRANSMITTER NO DATA .
C2124 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2124 RL TRANSMITTER NO DATA .
C2221 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2221 FL TRANSMITTER PRESSURE DATA ABNORMAL .
C2222 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2222 FR TRANSMITTER PRESSURE DATA ABNORMAL .
C2223 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2223 RR TRANSMITTER PRESSURE DATA ABNORMAL .
C2224 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2224 RL TRANSMITTER PRESSURE DATA ABNORMAL .
C2321 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2321 FL TRANSMITTER STATUS ABNORMAL .
C2322 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2322 FR TRANSMITTER STATUS ABNORMAL .
C2323 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2323 RR TRANSMITTER STATUS ABNORMAL .
C2324 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2324 RL TRANSMITTER STATUS ABNORMAL .
C2421 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2421 FL TRANSMITTER BATTERY VOLTAGE DECREASE .
C2422 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2422 FR TRANSMITTER BATTERY VOLTAGE DECREASE .
C2423 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2423 RR TRANSMITTER BATTERY VOLTAGE DECREASE .
C2424 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2424 RL TRANSMITTER BATTERY VOLTAGE DECREASE .
C2521 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2521 SPEED ABNORMAL .
C2721 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2721 THRESHOLD READ MALFUNCTION .
C2821 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2821 WHEEL POSITION SENSING ABNORMAL .
C2921 Ref. to TIRE PRESSURE MONITOR (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2921 ID REGISTRATION ERROR .
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  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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