What Does P2407 Mean?
The leak detection pump sense circuit is providing inconsistent or erratic readings to the PCM. This suggests an intermittent electrical problem rather than a constant fault.
Common Causes
40%
Intermittent connection at leak detection pump connector
30%
Chafed or damaged wiring with intermittent short or open
20%
Failing leak detection pump with intermittent internal fault
7%
Moisture intrusion in connector causing intermittent signal loss
3%
Poor ground connection in EVAP system circuit
Diagnostic Steps
1
Step 1: Wiggle test all wiring and connectors while monitoring scan tool live data for signal dropout
2
Step 2: Inspect wiring harness routing for contact with hot or moving components that could cause intermittent damage
3
Step 3: Check connector terminals for looseness, corrosion, or bent pins causing poor contact
4
Step 4: Apply dielectric grease to connector and secure all connections, clear codes and road test
5
Step 5: If fault returns, replace leak detection pump and retest
Estimated Repair Cost
$120 - $600
Parts + labor, varies by vehicle and location
The leak detection pump sense circuit is providing inconsistent or erratic readings to the PCM. This suggests an intermittent electrical problem rather than a constant fault.
The most common cause of P2407 (Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic) is: Intermittent connection at leak detection pump connector
Typical repair costs for P2407 range from $120 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. Intermittent fault may cause check engine light to come and go, affecting emissions compliance.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2407 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
