AutoCodes - OBDII Code List - P0448 NISSAN

P0448 NISSAN - Evaporative Emission Control System Vent Control Circuit Close

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

P0448 NISSAN Possible Causes

  • Faulty canister vent control valve
  • Purge Control Valve harness is open or shorted
  • Purge Control Valve electrical circuit poor connection

How do I fix code P0448 NISSAN?

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.
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Tech Notes

A very common problem with Nissan vehicles. Before replacing any parts, check for damage EVAP canister and for loose hoses from the vent control valve to the canister.

There is a factory Nissan service bulletin to help diagnose the P0448 code:
Nissan Factory Service Bulletin OBDII Code P0448

There are factory service bulletins for the following Nissan models:

2005-2007 Nissan Pathfinder
2005-2007 Nissan Pathfinder Service Bulletin OBDII Code P0448

2007-2009 Nissan Altima Sedan
2008-2009 Nissan Altima Coupe
2007-2009 Nissan Altima Hybrid
2009 Nissan Maxima
Nissan Factory Service Bulletin OBDII Code P0448

2006-2015 Nissan Titan
2006-2015 Nissan Titan Factory Service Bulletin OBDII Code P0448

Cost of diagnosing the P0448 NISSAN code

Labor: 1.0

The cost of diagnosing the P0448 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

EVAP canister vent control valve remains closed under specified driving conditions.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0448 NISSAN Description

The Evaporative Emission System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid (the EVAP canister vent control valve) responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system componentsThis solenoid valve is used only for diagnosis, and usually remains opened. When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP Control System (Small Leak) diagnosis.
OBDII Code P0448 Nissan - Evaporative Emission Control System Vent Control Circuit Close - AutoCodes.com

More Information

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Comments

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