Code result
P25F7
AIR System B Incorrect Flow Detected
Moderate severity
What it means
The second AIR system delivers measurably more or less air than expected. Often a partially blocked pipe, a worn pump, or a leak between pump and check valve.
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
Air pipe partially blocked by carbon
highOne of the most commonly reported causes for this code — check this first.
Worn pump impeller reduces flow
mediumA plausible cause — test and verify before replacing parts.
Leak between pump and check valve
mediumA plausible cause — test and verify before replacing parts.
Related help
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