P1440 Nissan Code - Evaporative Emission Control System Small Leak
Quick Answer
The P1440 Nissan code indicates a small leak in the evaporative emission control system. Common causes include Loose or damaged gas cap, Cracked or damaged hoses in the evaporative emission control system, Faulty purge valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1440 Nissan indicates Evaporative Emission Control System Small Leak.
- Common causes
- Common causes include Loose or damaged gas cap, Cracked or damaged hoses in the evaporative emission control system, Faulty purge valve.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1440 Nissan Description
The P1440 Nissan code indicates a small leak in the evaporative emission control system. This system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from escaping into the atmosphere. A small leak can lead to increased emissions and may trigger the check engine light. If left unresolved, this issue can affect the vehicle's overall performance and fuel efficiency. The evaporative emission control system is crucial for meeting emissions standards and ensuring the proper operation of the vehicle's engine.
Common Causes of P1440 Nissan
- Loose or damaged gas cap
- Cracked or damaged hoses in the evaporative emission control system
- Faulty purge valve
- Leaking charcoal canister
- Issues with the fuel tank pressure sensor
Symptoms of P1440 Nissan
- Check engine light illuminated
- Smell of gasoline near the vehicle
- Decreased fuel efficiency
- Hissing or hissing noises from the fuel tank area
- Difficulty starting the vehicle
How to Fix P1440 Nissan
- Perform a visual inspection of the evaporative emission control system components to identify any visible leaks or damage.
- Check the gas cap and ensure it is properly tightened or replace it if damaged.
- Use a smoke machine to pinpoint the location of the small leak in the system.
- Replace any damaged hoses, the purge valve, or charcoal canister as needed.
- Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1440 Nissan
The typical repair cost for addressing a P1440 Nissan code can range from $100 to $500, depending on the specific cause of the small leak and the cost of replacement parts. Labor costs can vary, but most auto repair shops charge between $80 and $150 per hour for diagnosis and repairs. It's recommended to get a detailed estimate from a local repair shop to determine the exact cost for your vehicle.
Tech Notes for P1440 Nissan
There is a factory Nissan service bulletin to help diagnose the P1440 code:
Nissan Factory Service Bulletin OBDII Code P1440
When is the Code Detected?
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Frequently Asked Questions about P1440 Nissan Code
No Frequently Asked Questions about P1440 Nissan Code found.
Discuss the causes and fixes for P1440 Nissan OBDII Code
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No I didn't replace parts yet because I don't know what I can replace first. I re tighten the gas cap but the check engine light still come on after an hour drive.
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Small EVAP leaks are very difficult to find. If the gas cap is tight then you may have to have a repair shop find the small leak with a smog machine.
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