P25EEVacuum Pump Control Circuit B/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P25EE covers the second control circuit of an electric brake vacuum pump, the part of the wiring that should carry voltage while the pump is switched on. Ford's 2019 OBD summary for its hybrid and plug-in models assigns P25EE to the brake system module, mapped from that module's own code C1036: with the pump relay commanded closed, a monitoring line voltage below 250 mV for one second means the pump is not getting its supply, typically from an open circuit, a failed relay contact or a blown fuse. Circuit A (P258A) is judged with the relay open instead. On these vehicles the pump keeps the brake booster supplied when the combustion engine is shut down. P25EF to P25F1 are the performance, low and high codes of the same circuit. CARB treats such electrical outputs as comprehensive components. The pedal can turn hard.
- What you may notice
- Hard brake pedal, especially with the engine off or in electric drive
- Brake or traction warning lamp in addition to the check engine lamp
- Vacuum pump never heard running
- Likely causes
- LikelyBlown vacuum pump fuse
- PossiblePump relay contact not closing
- PossibleBroken wire or loose connector between relay and pump
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.