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.
2023 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Immobilizer Systems DTCS
ENGINE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description & trouble part | Reference |
|---|---|---|
| B1571 | REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CONTROL MODULE TO ECM) | Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CONTROL MODULE TO ECM) . |
| B1572 | IMM CIRCUIT EXCEPT ANTENNA CIRCUIT | Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT . |
| B1576 | ECM EEPROM | Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1576 EGI CONTROL MODULE EEPROM . |
| B1577 | IMMOBILIZER CONTROL MODULE EEPROM | Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1577 IMM CONTROL MODULE EEPROM . |
BODY INTEGRATED UNIT DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
IMMOBILIZER CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
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.