AutoCodes - Nissan - P0456 2007 NISSAN ALTIMA

P0456 2007 NISSAN ALTIMA Code - Evaporative Emission Control System Very Small Leak Detected

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3
Table of contents

|P0456 2007 NISSAN ALTIMA code possible causes

  • 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 do I fix the P0456 2007 NISSAN ALTIMA code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0456 2007 NISSAN ALTIMA 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

|Cost of diagnosing the P0456 2007 NISSAN ALTIMA code

Labor: 1.0

The cost of diagnosing the P0456 2007 NISSAN ALTIMA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0456 2007 NISSAN ALTIMA code detected?

Evaporative Emission (EVAP) control system has a very small leak such as loose fuel filler cap.

|What are P0456 2007 NISSAN ALTIMA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible a noticeable fuel odor caused by the release of fuel vapors

|P0456 2007 NISSAN ALTIMA code 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 - Evaporative Emission Control System Very Small Leak Detected - AutoCodes.com

|Need more information with the P0456 2007 NISSAN ALTIMA code?

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|P0456 2007 NISSAN ALTIMA code comments

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