What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
4Original wording in English
FORD, LINCOLN
Reported code forms B1D55:31
Some 2020-2022-Corsair, 2021-2023 Nautilus, 2020-2024 Navigator/Aviator, and 2021-2024 Mustang Mach-E vehicles equipped with phone-as-a-key may exhibit various phone-as-a-key concerns with diagnostic trouble codes (DTC)…
LINCOLN
Reported code forms B1D55
Some 2020 Navigator and 2020 Corsair vehicles may have diagnostic trouble codes (DTCs) P1269, B1A56, B1D55, B1589, and/or B1590 through B1598 stored in the RFA module with no reported customer symptoms. If these DTCs…
LINCOLN
Reported code forms B1D55
Some 2020 Corsair vehicles may exhibit diagnostic trouble codes (DTCs) P1269, B1A56, B1D55, B1589, and/or B1590 through B1598 stored in the RFA module with no detectable customer symptoms. If these DTCs are detected…
FORD
Reported code forms B1D55
2019 F-Super Duty fleet-only vehicles equipped with a telematics control unit (TCU) may have DTC B1D55 present. These vehicles are not equipped with a secondary antenna due to the fleet-only TCU not requiring a…
Check vehicle applicability
22A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | F-250 SD | 2019 |
| Ford | F-350 SD | 2019 |
| Ford | MUSTANG MACH E | 2024 |
| Ford | MUSTANG MACH E | 2023 |
| Ford | MUSTANG MACH E | 2022 |
| Ford | MUSTANG MACH E | 2021 |
| Lincoln | AVIATOR | 2024 |
| Lincoln | AVIATOR | 2023 |
| Lincoln | AVIATOR | 2022 |
| Lincoln | AVIATOR | 2021 |
| Lincoln | CORSAIR | 2022 |
| Lincoln | CORSAIR | 2021 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.