Advanced Keyless Entry And Start System

2011 Mazda CX-7 i SV, 2.5 5SECTION Advanced Keyless Entry And Start System
ADVANCED KEYLESS ENTRY AND START SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Reference
B1093 Steering lock unit communication error DTC B1093 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1126 Steering lock unit internal malfunction DTC B1126 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1127 Keyless antenna (Interior, rear) DTC B1127 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1129 Keyless antenna (Interior, middle) DTC B1129 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1131 Keyless antenna (exterior, rear) DTC B1131 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1132 Keyless antenna (exterior, LF) DTC B1132 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1133 Keyless antenna (exterior, RF) DTC B1133 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1134 Unprogrammed advanced key DTC B1134 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1317 Keyless control module power supply voltage increases DTC B1317/B1318 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B1318 Keyless control module power supply voltage decreases
B1342 Keyless control module internal malfunction DTC B1342 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B2170 Push switch (Steering lock unit) DTC B2170 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
B2477 Configuration error DTC B2477 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
U0073 Control module communication error FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L3 WITH TC)]
U0100 Communication error to PCM
U0140 Abnormal message from BCM
U0214 Keyless receiver DTC U0214 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
U0236 Steering lock unit communication system DTC U0236 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
U0323 Communication error to instrument cluster FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L3 WITH TC)]
U2023 Abnormal message from PCM DTC U2023 [ADVANCED KEYLESS ENTRY AND START SYSTEM]
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.