Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic
What does P2407 mean?
The P2407 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic. This is a low severity code.
Common Symptoms
- Check Engine Light comes and goes
- Intermittent emissions code stored
- No drivability symptoms
- EVAP system monitor inconsistent results
- Code may clear itself then return
Probable Causes (Ranked by Likelihood)
- Loose or intermittent connection at pump connector Very High
- Degraded wiring with intermittent contact High
- Pump sensor failing intermittently Moderate
- Water intrusion in connector causing intermittent signal Moderate
Step-by-Step Diagnostic Procedure
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Wiggle test the pump connector and wiring while monitoring live data
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Inspect connector pins for looseness or corrosion
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Check wiring for intermittent breaks by flexing the harness
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Clean and apply dielectric grease to the pump connector
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Monitor pump sense circuit over multiple drive cycles
Frequently Asked Questions
Can I drive with code P2407?
Yes, safe to drive. The intermittent nature of this code often makes it appear and disappear on its own.
What causes P2407?
Usually a loose connector or corroded wiring that makes intermittent contact. Cleaning and reseating the connector with dielectric grease often resolves it.
Is P2407 expensive to fix?
Often $50 to $350. Connector cleaning and reseating is inexpensive. If the pump sensor is failing, pump replacement is needed.