Code result
P2636
Fuel Pump B Low Flow/Performance
Moderate severity
What it means
The second fuel pump runs but does not deliver expected volume or pressure. Worn pump, restricted filter, or leaking pressure regulator.
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 impeller reduces volumetric efficiency
highOne of the most commonly reported causes for this code — check this first.
Restricted in-tank or in-line fuel filter
mediumA plausible cause — test and verify before replacing parts.
Pressure regulator leaks back to tank
mediumA plausible cause — test and verify before replacing parts.
Related help
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