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)]DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3
DTC Table [Immobilizer System (Keyless Entry System)]
2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3SECTION DTC Table [Immobilizer System (Keyless Entry System)]
| DTC | Description | Reference | |||||
|---|---|---|---|---|---|---|---|
| Security light flashing pattern | M-MDS display(1) | ||||||
| Instrument cluster | PCM | ||||||
| 11 | B10D9:87 | P1260:00 | Communication error with coil antenna | (See SECURITY LIGHT: 11, DTC: B10D9:87/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 12 | B10D5:13 | P1260:00 | Coil antenna malfunction | (See SECURITY LIGHT: 12, DTC: B10D5:13/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 13 | B10D7:05 | P1260:00 | Key ID number error | (See SECURITY LIGHT: 13, DTC: B10D7:05/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| B10D7:94 | P1260:00 | (See SECURITY LIGHT: 13, DTC: B10D7:94/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||||
| 14 | B10D7:81 | P1260:00 | Receiving erratic serial data | (See SECURITY LIGHT: 14, DTC: B10D7:81/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 15 | B10D7:51 | P1260:00 | Unprogrammed key ID number | (See SECURITY LIGHT: 15, DTC: B10D7:51/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 16 | U0100:87 | P1260:00 | Communication error with PCM (No response) | (See SECURITY LIGHT: 16, DTC: U0100:87/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 21 | B10D8:00 | P1260:00 | Shortage of programmed key | (See SECURITY LIGHT: 21, DTC: B10D8:00/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 22 | B10DA:51 | P1260:00 | Communication error with PCM (Data transfer failure) | (See SECURITY LIGHT: 22, DTC: B10DA:51/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 23 | B10DA:62 | P1260:00 | Communication error with PCM (Data mis-match) | (See SECURITY LIGHT: 23, DTC: B10DA:62/P1260:00 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| Not illuminated | U0001:88 | U0073:00 | Module communication error (HS-CAN) | (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .) | |||
| Not illuminated | U0100:00 | - | Communication error with PCM | ||||
| Not illuminated | U3000:41 | - | Instrument cluster internal malfunction | (See DTC U3000:41 [INSTRUMENT CLUSTER] .) | |||
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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.