Code result
P2404
EVAP Leak Detection Pump Sense Circuit Range/Performance
Moderate severity
What it means
The sense (reed-switch or current-feedback) signal from the leak-detection pump is electrically valid but does not match expectations during a leak test. Often a worn pump diaphragm or a sticking reed contact.
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
Pump diaphragm worn
highOne of the most commonly reported causes for this code — check this first.
Reed switch intermittent
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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