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