P1440: Purge Valve Stuck Open
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA complaint patterns, then kept at 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 P1440.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public 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 P1440 Mean?
P1440 code: Purge Valve Stuck Open. Symptoms, likely causes, diagnostic path, severity, and repair cost context.
Symptoms of P1440
- ⚠️ Warning light or diagnostic trouble code is stored
- ⚠️ Symptoms vary by vehicle and by the system that set the code
- ⚠️ Related codes, freeze-frame data, and live data are needed before replacing parts
- ⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset
Common Causes
- 🔍 Circuit, sensor, actuator, wiring, connector, module, or mechanical condition detected by the relevant control module
- 🔍 Low battery voltage, poor ground, corrosion, water intrusion, or intermittent connector contact
- 🔍 Vehicle-specific calibration or service bulletin condition that must be checked by VIN
P1440 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"https://electricvehicleforums.com/forums/honda-civic-hybrid-12/civic-hybrid-ima-failure-bad-power-inverter-32102/index6.html On this link, there is a form of several other individuals experiencing the same issue that I experienced with this vehicle. Randomly, while driving, ON THE HIGHWAY, all the "
— Honda Civic owner, 2023-05-19
"The contact owns a 2015 Honda Civic. The contact stated that while driving at an undisclosed speed, the accelerator pedal and brake pedal felt stiff and the vehicle had jolted while depressing the brake pedal before losing automotive power. The check engine, brake, transmission, and several other wa"
— Honda Civic owner, 2024-10-15
Source: NHTSA Complaints Database
Most Reported Vehicles for P1440
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | HONDA CIVIC |
P1440 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Is P1440 enough to replace a part?
Can I drive with P1440?
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.