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Diagnostic Trouble Code (DTC): List

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Keyless access control module
    DTC Description & trouble part Reference
    B2271 IGN RELAY CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2271 IGN RELAY CONTROL CIRCUIT 
    B2274 ACC RELAY CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2274 ACC RELAY CONTROL CIRCUIT 
    B2275 ENGINE START REQUEST CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2275 ENGINE START REQUEST CONTROL CIRCUIT 
    B2276 ACC RELAY OFF SIGNAL Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2276 ACC RELAY OFF SIGNAL 
    B2277 KEYLESS ACCESS CONTROL MODULE (WATER DETECTION) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2277 SUBMERGING CIRCUIT 
    B227B PUSH ENGINE START SWITCH INPUT PERFORMANCE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B227B PUSH ENGINE START SWITCH INPUT PERFORMANCE 
    B227C P RANGE SIGNAL PERFORMANCE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B227C P RANGE SIGNAL PERFORMANCE 
    B227D KEYLESS ACCESS WITH PUSH BUTTON START Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B227D KEYLESS ACCESS WITH PUSH BUTTON START 
    B2282 VEHICLE SPEED SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2282 VEHICLE SPEED SIGNAL CORRELATION 
    B2283 VEHICLE SPEED SENSOR Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2283 VEHICLE SPEED SENSOR 
    B2284 BRAKE SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2284 BRAKE SIGNAL CORRELATION 
    B2285 STEERING LOCK POSITION SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION 
    B2286 ENGINE SPEED SIGNAL (WITHOUT AUTO START STOP) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2286 ENGINE SPEED SIGNAL (WITHOUT AUTO START STOP) 
    B228A ENGINE SPEED SIGNAL (WITH AUTO START STOP) 1
    B2781 STEERING LOCK CONTROL MODULE CONTROL CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2781 STEERING LOCK CONTROL MODULE CONTROL CIRCUIT 
    B2782 STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2782 STEERING LOCK DRIVE REQUEST SIGNAL CORRELATION 
    B2784 ANTENNA CIRCUIT (PUSH ENGINE SWITCH) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2784 ANTENNA CIRCUIT (PUSH ENGINE SWITCH) 
    B2785 LIN COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2785 LIN COMMUNICATION 
    B2786 STEERING LOCK CONTROL MODULE COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2786 STEERING LOCK CONTROL MODULE COMMUNICATION 
    B2788 IGN SIGNAL CORRELATION (STEERING LOCK CONTROL MODULE) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2788 IGN SIGNAL CORRELATION (STEERING LOCK CONTROL MODULE) 
    B2789 ID CODE BOX COMMUNICATION Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2789 ID CODE BOX COMMUNICATION 
    B278A PUSH ENGINE SWITCH POWER SUPPLY CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278A PUSH ENGINE SWITCH POWER SUPPLY CIRCUIT 
    B278B CAN CONTROL MODULE STUCK Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278B CAN CONTROL MODULE STUCK 
    B278D ID CODE BOX JUDGMENT CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B278D ID CODE BOX JUDGMENT CIRCUIT 
    B2790 ID CODE BOX CIRCUIT Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2790 ID CODE BOX CIRCUIT 
    B2793 BACKUP POWER Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2793 BACKUP POWER 
    B27A1 DRIVER SIDE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A1 DRIVER SIDE EXTERNAL ANTENNA OPEN 
    B27A2 PASSENGER SIDE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A2 PASSENGER SIDE EXTERNAL ANTENNA OPEN 
    B27A5 FRONT INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A5 FRONT INTERNAL ANTENNA OPEN 
    B27A6 REAR INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A6 REAR INTERNAL ANTENNA OPEN 
    B27A7 TRUNK/REAR GATE INTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A7 TRUNK/REAR GATE INTERNAL ANTENNA OPEN 
    B27A8 TRUNK/REAR GATE EXTERNAL ANTENNA OPEN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B27A8 TRUNK/REAR GATE EXTERNAL ANTENNA OPEN 
    U0074 CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0074 CONTROL MODULE COMMUNICATION BUS "BODY-CAN" OFF 
    U0100 LOST COMMUNICATION WITH ECM/PCM "A" Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" 
    U0101 LOST COMMUNICATION WITH TCM Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0101 LOST COMMUNICATION WITH TCM 
    U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE 
    U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE 
    U0230 LOST COMMUNICATION WITH REAR GATE MODULE 1
    U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" 
    U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE 
    U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE 
    U0531 INVALID DATA RECEIVED FROM REAR GATE MODULE 1
    U1120 LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE 1
    U1140 LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1140 LOST COMMUNICATION WITH BODY CONTROL MODULE BODY-CAN 
    U1198 LOST COMMUNICATION WITH TELEMATICS SYSTEM Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1198 LOST COMMUNICATION WITH TELEMATICS SYSTEM 
    U1422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE BODY-CAN 
    U1602 LOST COMMUNICATION WITH HANDS FREE SENSOR (1)
    U1670 LIN COMMUNICATION BUS 2 ERROR KEYLESS ACCESS WITH PUSH BUTTON START (1)
    (1) Not displayed on this vehicle due to the equipment specifications.
  2. ECM
    DTC Description & trouble part Reference
    B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CONTROL MODULE TO ECM) Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (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 KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT 
    B1576 ECM EEPROM Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1576 EGI CONTROL MODULE EEPROM 
    B1577 IMMOBILIZER CONTROL MODULE EEPROM Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1577 IMM CONTROL MODULE EEPROM 
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