LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2018 >> Forester 2.5i, Standard Trans >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Anti-Theft System (Immobilizer) DTCS >> ECM
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Anti-Theft System (Immobilizer) DTCS: ECM

ANTI-THEFT SYSTEM (IMMOBILIZER) (ECM) DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTC Item Content of diagnosis
B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM) Reference code incompatibility between body integrated unit and ECM
B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT
  • Communication failure between body integrated unit and ECM
  • Faulty antenna
  • Incorrect immobilizer key (use of unregistered key in body integrated unit)
  • Communication failure between key and body integrated unit
B1576 EGI CONTROL MODULE EEPROM ECM malfunctioning
B1577 IMM CONTROL MODULE EEPROM Body integrated unit malfunctioning
B1578 METER
(Except for C0 and C5 models)
  • Reference code incompatibility between combination meter and body integrated unit
  • Communication failure between body integrated unit and ECM
METER
(C0 and C5 models)
  • Reference code incompatibility between body integrated unit and security control module
  • Communication failure between body integrated unit and ECM