Evaporative Emission System Leak Detection Pump Sense Circuit Low
The P2405 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Sense Circuit Low. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $400 (parts and labor)
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Common Symptoms
- Check Engine Light illuminated
- Emissions test failure
- No drivability symptoms
- EVAP monitors not completing
- Possible fuel odor near vehicle
Probable Causes (Ranked by Likelihood)
- Shorted sense wire in leak detection pump circuit Very High
- Failed pressure sensor in pump (reading low) High
- Corroded connector causing low signal Moderate
- Large EVAP system leak preventing pressure buildup Moderate
Frequently Asked Questions
Can I drive with code P2405?
Yes, no driving concerns. Repair needed only for emissions compliance.
What causes P2405?
Usually a failed pressure sensor in the leak detection pump or a shorted sense wire. The pump assembly often needs replacement as a unit.
Is P2405 expensive to fix?
Typically $100 to $400. The pump assembly replacement is the standard repair.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check the pump sense circuit connector for corrosion
-
Measure sense circuit voltage (compare to specification)
-
Inspect wiring for shorts to ground
-
Perform EVAP smoke test to check for large leaks
-
Test pump output pressure with scan tool
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2011-2019 Jeep Cherokee
- 2012-2020 Dodge Journey
- 2013-2021 Chrysler Pacifica
- 2014-2022 Ram ProMaster
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