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
9Original wording in English
FORD
Reported code forms P166B
Some 2025 Explorer vehicles built on or before 27-Nov-2024 may exhibit driver power door lock and auto start stop system inoperative with diagnostic trouble code (DTC) P166B in the gear shift module (GSM).
FORD
Reported code forms P166B
Some 2021-2024 F-150 vehicles may exhibit a side door ajar and/or a hood ajar warning message displayed in the instrument panel cluster (IPC) with or without diagnostic trouble codes (DTC) P166B, B1175, B1176, B11C1…
FORD
Reported code forms P166B
Some 2021-2023 F-150 vehicles may exhibit a side door ajar and/or a hood ajar warning message displayed in the instrument panel cluster (IPC) with or without diagnostic trouble codes (DTC) P166B, B1175, B1176, B11C1…
FORD
Reported code forms P166B
Some 2017-2022 Ford GT vehicles may exhibit diagnostic trouble code (DTC) P166B present in the gear shift module (GSM) after an on-demand self test is performed. This is likely due to the driver door not being fully…
FORD
Reported code forms P166B
Some 2017-2021 Ford GT vehicles may exhibit diagnostic trouble code (DTC) P166B present in the gear shift module (GSM) after an on-demand self test is performed. This is likely due to the driver door not being fully…
FORD
Reported code forms P166B
Some 2021 F-150 vehicles may exhibit a side door ajar and/or a hood ajar warning message displayed in the instrument panel cluster (IPC) with or without diagnostic trouble codes (DTC) P166B, B1175, B1176, B11C1 and/or…
Check vehicle applicability
14A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | ESCAPE | 2020 |
| Ford | EXPLORER | 2025 |
| Ford | EXPLORER | 2021 |
| Ford | EXPLORER | 2020 |
| Ford | F-150 | 2024 |
| Ford | F-150 | 2023 |
| Ford | F-150 | 2022 |
| Ford | F-150 | 2021 |
| Ford | GT | 2022 |
| Ford | GT | 2021 |
| Ford | GT | 2020 |
| Ford | GT | 2019 |
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.