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C1F6B on the 2020 Nissan Sentra

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.

Bulletins for this model year that name C1F6B
NTB22-0882022-10-14. Service bulletin. LANE CAMERA OVER TEMPERATURE DTC STORED SERVICE INFORMATION The Lane Camera can become overheated if the interior room temperature or temperature around the camera becomes excessively high, and does not initially indicate a sustained fault. If overheated, the Lane Camera should be cooled to outside ambient temperature, any stored DTCs erased, and then allowed to resume operation. Refer to the ESM for any DTCs that will not erase. This condition may cause the following system functions to be suspended: • Vehicle-to-vehicle distance control mode (ICC - Intelligent Cruise Control) • Conventional (fixed speed) cruise control mode • Steering wheel assistance function • AEB (Automatic Emergency Braking) • LDW (Lane Departure Warning) • I-LI (Intelligent Lane Intervention) • Blind Spot Intervention • TSR (Traffic Sign Recognition) AND Can store one or more of the following DTCs as PAST or CURRENT: • C2501-4B (Front camera unit) • C1F05-4B (Front camera unit) • C1F6B-4B (Front camera unit) For customer information, see Talk Tip "Customer" statement on page 3.
NTB20-061a2021-03-06. Service bulletin. TRAFFIC SIGN RECOGNITION OR LANE DEPARTURE WARNING MALFUNCTION DISPLAYED AND MIL ON WITH DTC C2503-54 AND/OR C1F6B-54 STORED This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB20-0612020-09-11. Service bulletin. TRAFFIC SIGN RECOGNITION OR LANE DEPARTURE WARNING MALFUNCTION DISPLAYED AND MIL ON WITH DTC C2503-54 AND/OR C1F6B-54 STORED IF YOU CONFIRM The customer states that one of the following warnings is displayed on the vehicle information display along with the AEB Warning Light: • Traffic Sign Recognition Malfunction Displayed • Lane Departure Warning Malfunction Displayed And • The MIL is ON with DTC C2503-54 (CAMERA AIMING INCMP) and/or C1F6B-54 (CAMERA UNIT MALF) stored. NOTE: If DTC C2500-49 and/or C1F6B-49 is stored, this TSB does not apply. ACTION • If the vehicle was built on or before 1/31/2020, remove material from the lane camera and then reprogram the lane camera control unit. • If the vehicle was built after 1/31/2020 but before 5/29/2020, skip to step 6 and reprogram only the lane camera control unit.

3 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.