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

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.