OBD-II code · Powertrain (generic, extended)
P25F1 Vacuum Pump Control Circuit B High
Voltage on the secondary vacuum pump control line is above the expected window. Typical causes are a short to battery or an open motor that lets the driver float high.
Is it safe to drive with P25F1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to a B+ supply
- PossibleOpen motor winding or worn brushes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Vacuum Pump B, Wiring Harness
Related codes
- P258DVacuum Pump Control Circuit A High
- P25EEVacuum Pump Control Circuit B / Open
- P25EFVacuum Pump Control Circuit B Range/Performance
- P25F0Vacuum Pump Control Circuit B Low
- P25F2Turbocharger/Supercharger Boost Sensor C Circuit
- P25F3Turbocharger/Supercharger Boost Sensor C Circuit Range/Performance
- P25F4Turbocharger/Supercharger Boost Sensor C Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.