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.
2017 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE
Body Control System DTCS
BODY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Item | Note |
|---|---|---|
| None | COMMUNICATION FOR INITIALIZING IMPOSSIBLE | <Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Subaru Select Monitor.> |
| B1010 | BODY CONTROL SYSTEM (BIU) MALFUNCTION | <Ref. to DTC B1010 BODY CONTROL SYSTEM (BIU) MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1011 | BATTERY CONTROL POWER SUPPLY | <Ref. to DTC B1011 BATTERY CONTROL POWER SUPPLY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1012 | BATTERY BACKUP POWER SUPPLY | <Ref. to DTC B1012 BATTERY BACKUP POWER SUPPLY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1013 | IGNITION POWER | <Ref. to DTC B1013 IGNITION POWER , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1014 | ACC POWER | <Ref. to DTC B1014 ACC POWER , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1015 | KEY INTERLOCK CIRCUIT | <Ref. to DTC B1015 KEY INTERLOCK CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1016 | SHIFT LOCK CIRCUIT | <Ref. to DTC B1016 SHIFT LOCK CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1401 | METER COLLATION | <Ref. to DTC B1401 METER COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1402 | IMMOBILIZER KEY COLLATION | <Ref. to DTC B1402 IMMOBILIZER KEY COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1405 | SCU COLLATION | <Ref. to DTC B1405 SCU COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1406 | SCU_EEPROM | <Ref. to DTC B1406 SCU_EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1407 | MET COMMUNICATION | <Ref. to DTC B1407 MET COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1408 | METER NON-VOLATILE MEMORY | <Ref. to DTC B1408 METER NON-VOLATILE MEMORY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1409 | SCU COMMUNICATION | <Ref. to DTC B1409 SCU COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1410 | TRANSPONDER COMMUNICATION | <Ref. to DTC B1410 TRANSPONDER COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1411 | IMMOBILIZER ANTENNA | <Ref. to DTC B1411 IMMOBILIZER ANTENNA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U1201 | CAN-HS COUNTER ABNORMAL | <Ref. to DTC U1201 CAN-HS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0073 | CONTROL MODULE COMMUNICATION BUS OFF | <Ref. to DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0100 | LOST COMMUNICATION WITH ECM/PCM "A" | <Ref. to DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0101 | LOST COMMUNICATION WITH TCM | <Ref. to DTC U0101 LOST COMMUNICATION WITH TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0122 | LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE | <Ref. to DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0128 | LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE | <Ref. to DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | <Ref. to DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0164 | LOST COMMUNICATION WITH HVAC CONTROL MODULE | <Ref. to DTC U0164 LOST COMMUNICATION WITH HVAC CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0327 | SOFTWARE INCOMPATIBILITY WITH VEHICLE SECURITY CONTROL MODULE | <Ref. to DTC U0327 SOFTWARE INCOMPATIBILITY WITH VEHICLE SECURITY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0401 | INVALID DATA RECEIVED FROM ECM/PCM "A" | <Ref. to DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0402 | INVALID DATA RECEIVED FROM TCM | <Ref. to DTC U0402 INVALID DATA RECEIVED FROM TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0416 | INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE | <Ref. to DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0417 | INVALID DATA RECEIVED FROM PARK BRAKE CONTROL MODULE | <Ref. to DTC U0417 INVALID DATA RECEIVED FROM PARK BRAKE CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0423 | INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE | <Ref. to DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0424 | INVALID DATA RECEIVED FROM HVAC CONTROL MODULE | <Ref. to DTC U0424 INVALID DATA RECEIVED FROM HVAC CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U0427 | INVALID DATA RECEIVED FROM VEHICLE SECURITY CONTROL MODULE | <Ref. to DTC U0427 INVALID DATA RECEIVED FROM VEHICLE SECURITY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U123C | LOST COMMUNICATION WITH HIGH BEAM ASSIST CONTROL MODULE | <Ref. to DTC U123C LOST COMMUNICATION WITH HIGH BEAM ASSIST CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U1500 | KEYLESS UART COM. MALFUNCTION | <Ref. to DTC U1500 KEYLESS UART COM. MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| U153D | INVALID DATA RECEIVED FROM HIGH BEAM ASSIST CONTROL MODULE | <Ref. to DTC U153D INVALID DATA RECEIVED FROM HIGH BEAM ASSIST CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
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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