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 MANUALSMAZDA20133 MAZDASPEED, 2.3L ENG VIN 3REPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3
On-Board Diagnostic [Immobilizer System (Keyless Entry System)]
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3SECTION On-Board Diagnostic [Immobilizer System (Keyless Entry System)]
- Foreword [Immobilizer System (Keyless Entry System)]
- DTC Inspection [Immobilizer System (Keyless Entry System)]
- Clearing DTC [Immobilizer System (Keyless Entry System)]
- DTC Table [Immobilizer System (Keyless Entry System)]
- SECURITY LIGHT: 11, DTC: B10D9:87/P1260:00 [Communication error with coil antenna]
- SECURITY LIGHT: 12, DTC: B10D5:13/P1260:00 [Coil antenna malfunction]
- SECURITY LIGHT: 13, DTC: B10D7:05/P1260:00 [Key ID number error]
- SECURITY LIGHT: 13, DTC: B10D7:94/P1260:00 [Key ID number error]
- SECURITY LIGHT: 14, DTC: B10D7:81/P1260:00 [Receiving erratic serial data]
- SECURITY LIGHT: 15, DTC: B10D7:51/P1260:00 [Unprogrammed key ID number]
- SECURITY LIGHT: 16, DTC: U0100:87/P1260:00 [Communication error with PCM (No response)]
- SECURITY LIGHT: 21, DTC: B10D8:00/P1260:00 [Shortage of programmed key]
- SECURITY LIGHT: 22, DTC: B10DA:51/P1260:00 [Communication error with PCM (Data transfer failure)]
- SECURITY LIGHT: 23, DTC: B10DA:62/P1260:00 [Communication error with PCM (Data mis-match)]
- PID/Data Monitor Inspection [Immobilizer System (Keyless Entry System)]
- PID/Data Monitor Table [Immobilizer System (Keyless Entry System)]
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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.