Reference meaning
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.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
B178F-15Turn Signal Switch-circuit Short To Battery Or Open
Manufacturer communications
2Original wording in English
JEEP
Not applicable to vehicles built for US market. Collision Warning And Lane Keep Assist Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● B178F-15 - Turn Signal Switch-circuit Short To Battery Or Open. ● B1051-…
JEEP
MODULE Steering Control Before replacing the steering column control module (SCCM) due to front or rear windshield wiper operation / blindspot inop / lane assistant inop/ DTC B178F-15 active, please follow these steps: 1.- Refer to TSB-08-219-24 MP - Rear Windshield Wipers Operate Continuously and TSB 08-136-24 REV. A - Adaptive…
Check vehicle applicability
4A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.