P2400: EVAP System Leak Detection Pump Control Circuit/Open
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to generic code level because this page is not scoped to one make or model.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P2400.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P2400 Mean?
P2400 code: EVAP System Leak Detection Pump Control Circuit/Open. Symptoms, likely causes, diagnostic path, severity, and repair cost context.
Symptoms of P2400
- ⚠️ Warning light or diagnostic trouble code is stored
- ⚠️ Fuel economy may drop, fuel smell or exhaust smell may increase, or emissions readiness may fail
- ⚠️ The vehicle may drive normally while the monitor continues to fail
- ⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset
Common Causes
- 🔍 Sensor reading, wiring, connector, actuator, emissions, or module condition detected by the control module
- 🔍 Low battery voltage, poor ground, software, or network issue affecting the related circuit
- 🔍 Mechanical condition that should be confirmed with live data before replacing parts
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"Driving uphill when the car suddenly jolted, lost power, and all warning lights became illuminated. All safety features were disabled as well. The sudden stop almost resulted in being rear ended and the car was barely drivable afterwards. Diagnostic trouble codes: P26A6, P2004, P2005, P060B, P0191, "
— Subaru Forester owner, 2023-02-01
Source: NHTSA Complaints Database
Most Reported Vehicles for P2400
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | SUBARU FORESTER |
Frequently Asked Questions
Is P2400 enough to replace a part?
Can I drive with P2400?
What To Do Next
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.