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.
DTC Table [Immobilizer System (Keyless Entry System)]
2010 Mazda 5 Sport, 2.3 L, StandardSECTION DTC Table [Immobilizer System (Keyless Entry System)]
WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.
DTC CHART
| DTC | Detection condition | Page | |||||
|---|---|---|---|---|---|---|---|
| Security light flashing pattern | M-MDS display(1) | ||||||
| Instrument cluster | PCM | ||||||
| 11 | B1691 | P1260 | No detected communication with the coil antenna | (See SECURITY LIGHT 11, DTC B1681/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 12 | B2103 | P1260 |
|
(See SECURITY LIGHT 12, DTC B2103/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 13 | B1600 | P1260 | The key ID number data cannot be read. | (See SECURITY LIGHT 13, DTC B1600/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| B2431 | P1260 | Key ID number registration error | (See SECURITY LIGHT 13, DTC B2431/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | ||||
| 14 | B1602 | P1260 | The instrument cluster cannot read key ID number data normally. | (See SECURITY LIGHT 14, DTC B1602/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 15 | B1601 | P1260 | The instrument cluster has detected unregistered key ID number. | (See SECURITY LIGHT 15, DTC B1601/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 16 | U2510 | P1260 | Communication error between the instrument cluster and the PCM (no response) | (See SECURITY LIGHT 16, DTC U2510/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 21 | B1213 | P1260 | Only one key ID number is registered. | (See SECURITY LIGHT 21, DTC B1213/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 22 | B2141 | P1260 | Communication error between the instrument cluster and the PCM (data transfer error) | (See SECURITY LIGHT 22, DTC B2141/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| 23 | B2139 | P1260 | ID number data in the PCM and the instrument cluster do not match. | (See SECURITY LIGHT 23, DTC B2139/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) | |||
| Not illuminated | B1342 | - | Instrument cluster malfunction | (See DTC B1342 [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.