Section 20 (Tire Pressure Monitoring System (TPMS) (Diagnostics))
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Inspection Mode
- Diagnostic Procedure for Subaru Select Monitor Communication
- Data Monitor
- Register Transmitter (ID)
- Tire Pressure Warning Light/Trouble Indicator Light Illumination Pattern
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC C2021: Fl Tire Air Pressure Decrease Normal Mode
- DTC C2022: Fr Tire Air Pressure Decrease Normal Mode
- DTC C2023: RR Tire Air Pressure Decrease Normal Mode
- DTC C2024: RL Tire Air Pressure Decrease Normal Mode
- DTC C2121: Fl Transmitter No Data
- DTC C2122: Fr Transmitter No Data
- DTC C2123: RR Transmitter No Data
- DTC C2124: RL Transmitter No Data
- DTC C2221: Fl Transmitter Pressure Data Abnormal
- DTC C2222: Fr Transmitter Pressure Data Abnormal
- DTC C2223: RR Transmitter Pressure Data Abnormal
- DTC C2224: RL Transmitter Pressure Data Abnormal
- DTC C2321: Fl Transmitter Status Abnormal
- DTC C2322: Fr Transmitter Status Abnormal
- DTC C2323: RR Transmitter Status Abnormal
- DTC C2324: RL Transmitter Status Abnormal
- DTC C2421: Fl Transmitter Battery Voltage Decrease
- DTC C2422: Fr Transmitter Battery Voltage Decrease
- DTC C2423: RR Transmitter Battery Voltage Decrease
- DTC C2424: RL Transmitter Battery Voltage Decrease
- DTC C2521: Speed Abnormal
- DTC C2721: Threshold Read Malfunction
- DTC C2821: Wheel Position Sensing Abnormal
- DTC C2921: Id Registration Error