Code P0504 reports an incorrect correlation between the two brake pedal switch contacts. On the Fiat 500 1.0 MHEV it makes the ESP, EBD, ABS and Hill Holder functions unavailable, although the vehicle runs normally.
- System
- Brakes
- Component
- Brake pedal switch
- Fault
- The ESP, EBD, ABS, Hill Holder and tyre pressure monitoring displays are unavailable, with the vehicle running normally.
- Typical symptoms
-
- ESP indications unavailable on the display
- EBD and ABS indications unavailable
- Hill Holder unavailable
- Tyre pressure monitoring unavailable
- The vehicle nevertheless runs normally
- Vehicles affected
-
- Fiat 500 1.0 MHEV 6v
- Main code
-
- P0504 Brake switch 1-2 correlation, incorrect relationship
- Related codes
-
- B1010 Brake pedal switch, fault
- C1215 Brake light switch
On this fault the diagnostic tool often returns several codes together.
- Solution
-
See the repair procedure verified on Sema Repair.
The cause and the repair are on Sema Repair
On Sema Repair every code is linked to verified fault cases. The case study gathers, where available, the information you need to reach the repair:
- Verified cause of the fault
- Step-by-step repair procedure
- Indicative repair times
- Manufacturer's notes
- Photo of the component with the repair point marked