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.
2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE
Immobilizer System DTCS
DTC DESCRIPTION (IMMOBILIZER SYSTEM)
| DTC | Refer to |
|---|---|
| U3000:96 | (See SECURITY INDICATOR LIGHT: 09, DTC U3000:96/P1260:00 .) |
| B10D9:87 | (See SECURITY INDICATOR LIGHT: 11, DTC B10D9:87/P 1260:00.) |
| B13D3:05 | (See SECURITY INDICATOR LIGHT: 13, DTC B13D3:05/P1260:00 .) |
| B13D3:94 | (See SECURITY INDICATOR LIGHT: 13, DTC B13D3:94/P1260:00 .) |
| B13D3:51 | (See SECURITY INDICATOR LIGHT: 15, DTC B13D3:51/P 1260:00.) |
| U0100:87 | (See SECURITY INDICATOR LIGHT:16, DTC U0100:87/P 1260:00 .) |
| B13D4:00 | (See SECURITY INDICATOR LIGHT: 21, DTC B13D4:00/P1260:00 .) |
| B10DA:51 | (See SECURITY INDICATOR LIGHT: 22, DTC B10DA:51/P1260:00 .) |
| B10DA:62 | (See SECURITY INDICATOR LIGHT: 23, DTC B10DA:62/P1260:00 .) |
Factory Service Tools
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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.
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