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 MANUALSACURA2023RDX BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXMASTER LIGHTING CONTROL UNIT DTCS
2023 Acura RDX Base
Master Lighting Control Unit DTCS
2023 Acura RDX BaseSECTION Master Lighting Control Unit DTCS
MASTER LIGHTING CONTROL UNIT
| DTC | Description | DTC type |
|---|---|---|
| B214A | Master lighting control unit internal failure | Internal error |
| B214B | Master lighting control unit internal failure | Internal error |
| B214C | Master lighting control unit lost communication with all ambient light on LIN | Loss of communication |
| B214D | Ambient light failure | Signal error |
| B214E | Master lighting control unit lost communication with ambient light on LIN | Loss of communication |
| U1280 | Master lighting control unit B-CAN communication error (BUS-OFF) | Loss of communication |
| U1281 | Master lighting control unit lost communication with MICU/BCM | Loss of communication |
| U128D | Master lighting control unit lost communication with gauge control module | Loss of communication |
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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.