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.
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HOMESERVICE MANUALSMAZDA2010CX-9 SPORT, 3.7 V, AWDREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXADVANCED KEYLESS AND START SYSTEM DTCS
2010 Mazda CX-9 Sport, 3.7 V, AWD
Advanced Keyless And Start System DTCS
2010 Mazda CX-9 Sport, 3.7 V, AWDSECTION Advanced Keyless And Start System DTCS
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] |
| B1128 | Keyless antenna (interior, middle) | DTC B1128 [ADVANCED KEYLESS ENTRY AND START SYSTEM] |
| B1129 | Keyless antenna (interior, front center) | 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 (16.1 V or more) | DTC B1317/B1318 [ADVANCED KEYLESS ENTRY AND START SYSTEM] |
| B1318 | Keyless control module power supply voltage decreases (less than 9 V) | |
| 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 | 09-02N-1 FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] |
| U0100 | Communication error to PCM | |
| U0140 | Communication error to 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 | 09-02N-1 FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] |
| U2023 | Abnormal message from other module | DTC U2023 [ADVANCED KEYLESS ENTRY AND START SYSTEM] |
RENDER: 1.0x
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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.