C1B84 on the 2018 Nissan Leaf
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| NTB18-057 | 2018-09-17. Service bulletin. 2018 LEAF; MALFUNCTION AND AEB WARNING LIGHTS ON IF YOU CONFIRM Malfunction and Automatic Emergency Braking (AEB) warning lights are ON with DTCs: - C1B84-00 ? (DIST SEN MALFUNCTION) - C1A17-49 ? (CONTROL UNIT (INTERNAL ELECTRONIC ERROR)) ACTION 1. Install the new Distance Sensor. 2. Add a foam strip to the new Distance Sensor. 3. Perform Radar Alignment. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work youwill be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair. |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.