AutoCodes – Nissan – P0456 2007 Nissan Altima Sedan

P0456 2007 Nissan Altima Sedan Code - Evaporative Emission Control System Very Small Leak Detected

Quick Answer

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0456 2007 Nissan Altima Sedan indicates Evaporative Emission Control System Very Small Leak Detected.
Common causes: Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,159

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0456 2007 Nissan Altima Sedan Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

OBDII Code P0456 2007 Nissan Altima Sedan - Evaporative Emission Control System Very Small Leak Detected - AutoCodes.com — P0456 2007 Nissan Altima Sedan Code - Evaporative Emission Control System Very Small Leak Detected

What does this mean?

What are the Possible Causes of the DTC P0456 2007 Nissan Altima Sedan?

Missing or loose fuel cap
Incorrect fuel filler cap used
Fuel filler cap remains open or fails to close
Foreign matter caught in fuel filler cap
Evaporative Emission (EVAP) canister or fuel tank leaks
Evaporative Emission (EVAP) system hose leaking
Fuel tank leaking

How to Fix the DTC P0456 2007 Nissan Altima Sedan?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The fuel tank filler cap and the Purge Volume Control Valve are the more common problems that will trigger the P0456 code on Nissan vehicles.

There is a factory Nissan service bulletin to help diagnose the P0456 code:
Nissan Factory Service Bulletin OBDII Code P0456

There is a factory Nissan service bulletin for the 2007 Nissan Altima Sedan:
2007 Nissan Altima Sedan Factory Service Bulletin OBDII Code P0456

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0456 2007 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0456 2007 Nissan Altima Sedan code?

Need more information on how to fix the P0456 2007 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0456 2007 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0456 2007 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0456 on a 2007 Nissan Altima Sedan?

The common symptoms of code P0456 include the check engine light coming on, a noticeable fuel odor, or difficulty filling the gas tank.

2. What are the possible causes of OBDII code P0456 on a 2007 Nissan Altima Sedan?

Possible causes of code P0456 include a loose gas cap, a damaged or cracked EVAP system component, a faulty purge valve, or a leak in the fuel tank or fuel lines.

3. How can I diagnose the source of the very small leak detected in the evaporative emission control system of my 2007 Nissan Altima Sedan?

To diagnose the source of the leak, you can perform a visual inspection of the EVAP system components, check the gas cap for proper sealing, conduct a smoke test to pinpoint the leak, and use a scan tool to monitor system pressure and sensor readings.

4. Can I continue driving my 2007 Nissan Altima Sedan with OBDII code P0456?

While the vehicle may still be operational, it is recommended to address code P0456 promptly to prevent potential issues with emissions, fuel economy, and overall performance.

5. How can I repair OBDII code P0456 on my 2007 Nissan Altima Sedan?

Repair options for code P0456 may include tightening or replacing the gas cap, repairing or replacing damaged EVAP system components, checking and cleaning the purge valve, and addressing any leaks in the fuel system.

6. Will resetting the check engine light resolve OBDII code P0456 on a 2007 Nissan Altima Sedan?

Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing code P0456. It is important to diagnose and repair the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code P0456 on a 2007 Nissan Altima Sedan?

The cost of repairing code P0456 can vary depending on the specific issue causing the code and the labor rates in your area. It is advisable to consult with a mechanic or dealership for a more accurate estimate.

8. Can a DIY enthusiast fix OBDII code P0456 on a 2007 Nissan Altima Sedan?

Some aspects of diagnosing and repairing code P0456 can be tackled by a DIY enthusiast, such as checking the gas cap and visually inspecting the EVAP system. However, more complex repairs may require professional expertise.

9. What long-term effects can OBDII code P0456 have on a 2007 Nissan Altima Sedan if left untreated?

If left untreated, code P0456 can lead to increased emissions, reduced fuel efficiency, potential damage to the catalytic converter, and may cause the vehicle to fail emissions testing.

10. Is OBDII code P0456 a common issue in 2007 Nissan Altima Sedans?

Yes, code P0456 related to the evaporative emission control system very small leak detected is a common issue in 2007 Nissan Altima Sedans, as well as in other vehicles, and is often triggered by minor faults in the EVAP system.