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.
2013 Mazda MX-5 Miata Grand Touring, Automatic TransFACTORY OEM SERVICE PROCEDURE
Immobilizer System (Keyless Entry System) DTCS
IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | PCM | Description | Action |
|---|---|---|---|
| B1681 | P1260 | No detected communication with the coil antenna | SECURITY LIGHT 11, DTC B1681/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B2103 | P1260 |
|
SECURITY LIGHT 12, DTC B2103/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B1600 | P1260 | The key ID number data cannot be read. | SECURITY LIGHT 13, DTC 81600/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B2431 | P1260 | Key ID number registration error | SECURITY LIGHT 13, DTC B2431/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B1602 | P1260 | The instrument cluster cannot read key ID number data normally. | SECURITY LIGHT 14, DTC B1602/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B1601 | P1260 | The instrument cluster has detected unregistered key ID number. | SECURITY LIGHT 15, DTC B1601/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| U2510 | P1260 | Communication error between the instrument cluster and the PCM (no response) | SECURITY LIGHT 16, DTC U2510/P1260, U1147/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| U1147 | P1260 | Communication error between the instrument cluster and the PCM (mismatched conditions) | |
| B1213 | P1260 | Only one key ID number is registered. | SECURITY LIGHT 21, DTC B1213/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B2141 | P1260 | Communication error between the instrument cluster and the PCM (data transfer error) | SECURITY LIGHT 22, DTC B2141/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B2139 | P1260 | ID number data in the PCM and the instrument cluster do not match. | SECURITY LIGHT 23, DTC B2139/P1260 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
| B1342 | - | Instrument cluster malfunction | DTC B1342 [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.