Powertrain
Definition only
Lights the check engine lamp
P25EF: Vacuum Pump Control Circuit B Range/Performance
Standardized SAE J2012 code · P25xx — Auxiliary inputs
What does P25EF mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Worn diaphragm or vanes inside the pump
- Medium Cracked vacuum hose or loose connection
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P25EF on the same make and model first.
P25EF in the community
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