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.
C0040:24Brake switch (No.1 signal) circuit malfunction
Manufacturer communications
29Original wording in English
MAZDA
Some customers may experience a "Push Button Start Malfunction. Have the Vehicle Inspected" warning message and the following DTC(s) may be stored. C0040:24 - Brake switch (No.1 signal) circuit malfunction P0504:00 - Brake switch system: Circuit malfunction
FORD
Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the vehicle will not shift out of park (P). Diagnostic trouble codes (DTC) C0040 and/or P0504 may also be present. Reference TSB 22-2044 to make sure that no water or corrosion is present in the battery junction box (BJB). If Pinpoint Test A: Brake Shift Interloc…
FORD
Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the vehicle will not shift out of park (P). Diagnostic trouble codes (DTC) C0040 and/or P0504 may also be present. Reference TSB 22-2044 to make sure that no water or corrosion is present in the battery junction box (BJB). If Pinpoint Test A: Brake Shift Interloc…
FORD
Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the vehicle will not shift out of park (P). Diagnostic trouble codes (DTC) C0040 and/or P0504 may also be present. Reference TSB 22-2044 to make sure that no water or corrosion is present in the battery junction box (BJB). If Pinpoint Test A: Brake Shift Interloc…
Check vehicle applicability
111A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ENCLAVE ↗ | 2008 |
| Buick | ENVISION ↗ | 2016 |
| Buick | LACROSSE ↗ | 2014 |
| Buick | LACROSSE ↗ | 2013 |
| Buick | LACROSSE ↗ | 2012 |
| Buick | LACROSSE ↗ | 2009 |
| Buick | LACROSSE ↗ | 2008 |
| Buick | LACROSSE ↗ | 2007 |
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.