Code result
P25EF
Vacuum Pump Control Circuit B Range/Performance
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Worn diaphragm or vanes inside the pump
highOne of the most commonly reported causes for this code — check this first.
Cracked vacuum hose or loose connection
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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