Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
The P2404 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $400 (parts and labor)
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Common Symptoms
- Check Engine Light illuminated
- Failed emissions test
- No noticeable drivability issues
- EVAP system readiness monitor not completing
- Possible fuel vapor smell
Probable Causes (Ranked by Likelihood)
- Weak or degraded leak detection pump Very High
- Small EVAP system leak affecting pump performance High
- Loose or cracked gas cap Moderate
- Cracked EVAP hose or canister Moderate
Frequently Asked Questions
Can I drive with code P2404?
Yes, safe to drive. This is purely an emissions code with no effect on vehicle operation.
What causes P2404?
Often a small EVAP leak or a gas cap that is not sealing properly. Try tightening or replacing the gas cap first before further diagnosis.
Is P2404 expensive to fix?
Costs range from $50 for a gas cap to $400 for pump replacement. An EVAP smoke test is recommended to pinpoint the leak source.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check gas cap for proper seal and tightness
-
Perform an EVAP smoke test to find any leaks
-
Test leak detection pump pressure output
-
Inspect all EVAP hoses for cracks or disconnections
-
Check the charcoal canister for damage
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
- 2012-2020 Dodge Charger
- 2013-2021 Jeep Wrangler
- 2011-2019 Chrysler 200
- 2014-2022 Ram 1500
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