P0504 on Ford vehicles

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns Ford filed with NHTSA whose summary names P0504. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• TSB 22-2044 Service bulletin
  2022-02-16 · Electrical System
• Some 2020-2022 F-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. The vehicle may also have an illuminated anti-lock braking system (ABS) indicator with diagnostic trouble codes (DTCs) C0020 and U3003 in the ABS module. The vehicle may not shift out of park (P) and/o
• SSM 50848 Service bulletin
  2022-06-14 · Power Train
• 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 Interlock in Workshop Manual (WSM), Section 307-05 leads to a concern with cir
• SSM 50864 Service bulletin
  2022-06-16 · Power Train
• 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 Interlock in Workshop Manual (WSM), Section 307-05 leads to a concern with cir
• TSB 21-2422 Service bulletin
  2021-11-30 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
• Some 2021 EcoSport vehicles equipped with a 1.0L EcoBoost engine may exhibit a condition where the auto start/stop system is inoperative or cruise control disabled with an illuminated powertrain malfunction (wrench) and/or brake warning indicator with diagnostic trouble code (DTC) P164C or P0504 stored in the powertrain control module (PCM). The vehicle may also exhibit an engine stall while braki
• TSB 22-2011 Service bulletin
  2022-01-24 · Electrical System
• Some 2021 EcoSport vehicles may exhibit a condition where the cruise control system is inoperative with an illuminated powertrain malfunction (wrench) indicator and illuminated brake warning indicator with diagnostic trouble code (DTC) P0504 stored in the powertrain control module (PCM). This may be due to the software in the PCM and/or an incorrectly installed stoplamp switch. To correct this con

A stored code names the test that failed, never the part that caused it. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.