AutoCodes
 
OBDII Code List
 
P0456 2003 NISSAN SENTRA

P0456 2003 NISSAN SENTRA - Evaporative Emission Control System Very Small Leak Detected

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3   
Comments  |  Add Comment

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

When is the code detected?

Malfunction is detected when Evaporative Emission (EVAP) control system has a very small leak, EVAP control system does not operate properly.

Possible symptoms

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

P0456 2003 Nissan Sentra 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 2003 Nissan Sentra - Evaporative Emission Control System Very Small Leak Detected - AutoCodes.com

Need more help?

Get the P0456 2003 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area

Related Information

P0456 2003 NISSAN SENTRA Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0456 2003 Nissan Sentra code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧