OBD-II code · Powertrain (generic, extended)
P25EF Vacuum Pump Control Circuit B Range/Performance
The secondary vacuum pump does not produce the expected vacuum within the commanded run time. Leak in the pump line or worn pump diaphragm reduces output.
Is it safe to drive with P25EF?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWorn diaphragm or vanes inside the pump
- PossibleCracked vacuum hose or loose connection
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Vacuum Pump B, Vacuum Lines, Vacuum Sensor
Related codes
- P258BVacuum Pump Control Circuit A Range/Performance
- P25ECSupercharger Disconnect Clutch Circuit Low
- P25EDSupercharger Disconnect Clutch Circuit High
- P25EEVacuum Pump Control Circuit B / Open
- P25F0Vacuum Pump Control Circuit B Low
- P25F1Vacuum Pump Control Circuit B High
- P25F2Turbocharger/Supercharger Boost Sensor C Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.