Evaporative Emission System Leak Detection Pump Control Circuit Open
The P2400 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Control Circuit Open. 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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What Are the Symptoms of P2400?
- Check Engine Light illuminated
- Failed emissions test
- No noticeable drivability symptoms
- Fuel vapor smell near vehicle
- EVAP system monitor not completing
What Causes P2400? (Most Likely First)
- Failed EVAP leak detection pump Very High
- Damaged wiring to leak detection pump High
- Corroded leak detection pump connector Moderate
- Blown EVAP pump fuse Low
Can I Still Drive with P2400?
Yes, but fix soon. P2400 is rated low severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
Can I drive with code P2400?
Yes, safe to drive. This EVAP code does not affect engine performance or safety. However, you will fail an emissions test until it is repaired.
What causes P2400?
Usually a failed EVAP leak detection pump. These pumps are used to pressurize the fuel system to check for fuel vapor leaks.
Is P2400 expensive to fix?
Typically $100 to $400. The leak detection pump is a moderately priced part. Check the fuse and wiring first for a potentially cheaper fix.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2400?
-
Check the EVAP leak detection pump fuse
-
Locate the leak detection pump (usually near the fuel tank or charcoal canister)
-
Check power and ground at the pump connector
-
Measure pump motor resistance
-
Inspect wiring from ECM to the leak detection pump
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
Which Vehicles Commonly Get P2400?
- 2010-2018 Chrysler 200
- 2011-2019 Dodge Journey
- 2012-2020 Jeep Grand Cherokee
- 2013-2021 Ram 1500
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