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.
2015 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 Failure (Except Antenna Circuit) |
<Ref. to DTC B1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT) , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1574 | Key Communication Failure | <Ref. to DTC B1574 KEY COMMUNICATION FAILURE , 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 Failure (Except for C0 model) |
<Ref. to DTC B1578 METER FAILURE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| Meter Failure (C0 model) |
NOTE:
Perform diagnosis of engine DTC when a DTC other than an immobilizer DTC is detected. <Ref. to WRX LIST OF DIAGNOSTIC TROUBLE CODE (DTC)
.> <Ref. to WRX STI LIST OF DIAGNOSTIC TROUBLE CODE (DTC)
.>
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.