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.
2022 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
LF Control Unit
LF CONTROL UNIT DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Refer to |
|---|---|
| B10C1:14 | (See DTC B10C1:14 (BCM) .) |
| B10C3:14 | (See DTC B10C3:14 (BCM) .) |
| B10C6:1F | (See DTC B10C6:1F (BCM) .) |
| B10C8:1F | (See DTC B10C8:1F (BCM) .) |
| B10C9:1F | (See DTC B10C9:1F (BCM) .) |
| B10D9:87 | (See DTC B10D9:87 (BCM) .) |
| B11C4:23 | (See DTC B11C4:23 (BCM) .) |
| B11FD:1F | (See DTC B11FD:1F (BCM) .) |
| B1210:1F | (See DTC B1210:1F (BCM) .) |
| B13C3:29 | (See DTC B13C3:29 (BCM) .) |
| B13D3:16 | (See DTC B13D3:16 (BCM) .) |
| B13D3:4A | (See DTC B13D3:4A (BCM) .) |
| B13D3:51 | (See DTC B13D3:51 (BCM) .) |
| B13D3:94 | (See DTC B13D3:94 (BCM) .) |
| B2007:49 | (See DTC B2007:49 (BCM) .) |
| B2007:55 | (See DTC B2007:55 (BCM) .) |
| B2007:56 | (See DTC B2007:56 (BCM) .) |
| B2007:96 | (See DTC B2007:96 (BCM) .) |
| U1033:00 | (See DTC U1033:00 (BCM) .) |
| U201F:11 | (See DTC U201F:11 (BCM) .) |
| U201F:12 | (See DTC U201F:12 (BCM) .) |
| U2100:56 | (See DTC U2100:56 (BCM) .) |
| U2640:14 | (See DTC U2640:14 (BCM) .) |
| U2640:16 | (See DTC U2640:16 (BCM) .) |
| U2641:14 | (See DTC U2641:14 (BCM) .) |
| U2641:16 | (See DTC U2641:16 (BCM) .) |
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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