P0456 2007 Nissan Maxima 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 Maxima 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.
Code P0456 2007 Nissan Maxima Description
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.
What are the Possible Causes of the DTC P0456 2007 Nissan Maxima?
- 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 Maxima?
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.
Code Tech Notes
There is a factory Nissan service bulletin to help diagnose the P0456 code:
Nissan Factory Service Bulletin OBDII Code P0456
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0456 2007 Nissan Maxima 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.
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Frequently Asked Questions about P0456 2007 Nissan Maxima Code
1. What does OBDII code P0456 on a 2007 Nissan Maxima mean?
This code indicates that the Evaporative Emission Control System has detected a very small leak.
2. What are common symptoms of a P0456 code in a 2007 Nissan Maxima?
Common symptoms include the check engine light coming on, a strong fuel odor, and potential issues with passing emissions tests.
3. What are possible causes of a P0456 code in a 2007 Nissan Maxima?
Potential causes include a loose or damaged gas cap, a cracked or damaged EVAP system hose, a faulty EVAP canister, or a malfunctioning purge valve.
4. How can I diagnose the source of a P0456 code in a 2007 Nissan Maxima?
Diagnosing the issue may involve visually inspecting the EVAP system components, checking for a tight seal on the gas cap, and using a smoke machine to detect leaks in the system.
5. Can I continue driving my 2007 Nissan Maxima with a P0456 code?
While the vehicle may still be driveable, it is recommended to address the issue promptly to prevent potential damage to the engine and to ensure compliance with emissions regulations.
6. How can I repair a P0456 code in a 2007 Nissan Maxima?
Repair options may include tightening or replacing the gas cap, repairing or replacing damaged hoses, replacing the EVAP canister or purge valve, and clearing the code with a diagnostic tool.
7. Will a P0456 code reset itself on a 2007 Nissan Maxima?
In some cases, the code may reset itself after the underlying issue has been resolved and the vehicle has gone through several drive cycles without the problem reoccurring.
8. How much does it typically cost to fix a P0456 code on a 2007 Nissan Maxima?
The cost of repairs can vary depending on the specific cause of the code and whether you plan to address the issue yourself or take your vehicle to a mechanic. Costs can range from a few dollars for a new gas cap to a few hundred dollars for more extensive repairs.
9. Can a P0456 code be triggered by other issues unrelated to the EVAP system on a 2007 Nissan Maxima?
While the code is typically associated with the EVAP system, other factors such as a faulty oxygen sensor or fuel injector issues could potentially trigger a P0456 code as well.
10. How often should I check for a P0456 code on my 2007 Nissan Maxima?
It is a good practice to regularly check for any trouble codes, including P0456, by using an OBDII scanner, especially if you notice any unusual symptoms or changes in your vehicle's performance.
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