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.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Immobilizer System DTCS: ECM
ECM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Item | Description |
|---|---|---|
| B1570 | Antenna | < Ref. to DTC B1570 ANTENNA , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1571 | Reference Code Incompatibility | < Ref. to DTC B1571 REFERENCE CODE INCOMPATIBILITY , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1572 | IMM Circuit Except Antenna Circuit | < Ref. to DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1574 | Key Communication | < Ref. to DTC B1574 KEY COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1575 | Incorrect Immobilizer Key | < Ref. to DTC B1575 INCORRECT IMMOBILIZER KEY , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1576 | EGI Control Module EEPROM | < Ref. to DTC B1576 EGI CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1577 | IMM Control Module EEPROM | < Ref. to DTC B1577 IMM CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1578 | Meter | < Ref. to DTC B1578 METER , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
NOTE:
Perform diagnosis of engine DTC when a DTC other than an immobilizer DTC is detected. <Ref. to WRX
.> <Ref. to WRX STI
.>
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.
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