Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru Crosstrek Base, Automatic CVT TransFACTORY OEM SERVICE PROCEDURE
AWD Control System (Diagnostics)
- Basic Diagnostic Procedure
- Check List For Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Inspection Mode
- Warning Light Illumination Pattern
- Diagnostic Procedure For Subaru Select Monitor Communication
- Data Monitor
- Freeze Frame Data
- Active Test
- Work Support
- All Readiness Diagnostic Code(s)
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure With Diagnostic Trouble Code (DTC)
- DTC P1500: VDC Wheel Speed Sensor System
- DTC P1F00: Self-Shut Off Relay Circuit Low
- DTC P1F02: AWD Solenoid Circuit Low
- DTC P1F03: AWD Solenoid Circuit High
- DTC P1F04: AWD Solenoid Circuit Range/Performance
- DTC P1F05: System Voltage
- DTC P1F06: Internal Control Module Keep Alive Memory (KAM) Error
- DTC P1F07: Internal Control Module Random Access Memory (Ram) Error
- DTC P1F08: Internal Control Module Read Only Memory (ROM) Error
- DTC P1F09: Control Module Processor
- DTC P1F0A: Internal Control Module EEPROM Error
- DTC P1F0B: AWD Power Supply Voltage
- DTC P1F0C: Transfer Input Torque
- DTC U0073: Control Module Communication Bus Off
- DTC U0122: Lost Communication With Vehicle Dynamics Control Module
- DTC U0129: Lost Communication With Brake System Control Module
- DTC U0293: Lost Communication With Hybrid Powertrain Control Module
- DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module
- DTC U0418: Invalid Data Received From Brake System Control Module
- DTC U0594: Invalid Data Received From Hybrid Powertrain Control Module
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.