Powertrain
generic / SAE
P2404
EVAP Leak Detection Pump Sense Circuit Range/Performance
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 04
Possible causes
- Pump diaphragm worn high
- Reed switch intermittent medium
- Sensor element aged beyond calibration window low
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.5–2 h
- Component: evap leak detection pump
- Component: evap pump wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012