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.
2024 Subaru Outback Onyx EditionFACTORY OEM SERVICE PROCEDURE
Keyless Entry DTCS
KEYLESS ENTRY DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description & trouble part | Reference |
|---|---|---|
| B2771 | EEPROM PERFORMANCE | Ref. to KEYLESS ENTRY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2771 EEPROM PERFORMANCE . |
| B2772 | CONTROL MODULE COMMUNICATION STUCK | Ref. to KEYLESS ENTRY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2772 CONTROL MODULE COMMUNICATION STUCK . |
| U0073 | CONTROL MODULE COMMUNICATION BUS OFF | Ref. to KEYLESS ENTRY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF . |
| U0140 | LOST COMMUNICATION WITH BODY CONTROL MODULE | Ref. to KEYLESS ENTRY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE . |
| U0422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE | Ref. to KEYLESS ENTRY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE . |
Factory Service Tools
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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.