P2407 low

Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic

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.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
moderate
Estimated cost
$50 - $350 (parts and labor)
Recommended Tool
ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This
AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

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

  1. Wiggle test the pump connector and wiring while monitoring live data

  2. Inspect connector pins for looseness or corrosion

  3. Check wiring for intermittent breaks by flexing the harness

  4. Clean and apply dielectric grease to the pump connector

  5. 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.

Sources

This page is built from documented references. Verify against your own service info before repair work.

Explore More

Search codes Vehicle-specific fixes Guides By make

Was this helpful?

Share carcodefinder.com with a friend who needs to decode their check engine light.

Browse by symptom → Read repair guides → Fixes by vehicle →