AutoCodes - Nissan - P0448 2009 NISSAN ALTIMA SEDAN

P0448 2009 NISSAN ALTIMA SEDAN Code - Evaporative Emission Control System Vent Control Circuit Close

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

|P0448 2009 NISSAN ALTIMA SEDAN code 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 the P0448 2009 NISSAN ALTIMA SEDAN 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.

|P0448 2009 NISSAN ALTIMA SEDAN code 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 is a factory Nissan service bulletin for the 2009 Nissan Altima Sedan:
2009 Nissan Altima Sedan Factory Service Bulletin OBDII Code P0448

|Cost of diagnosing the P0448 2009 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost of diagnosing the P0448 2009 NISSAN ALTIMA SEDAN 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 P0448 2009 NISSAN ALTIMA SEDAN code detected?

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

|What are P0448 2009 NISSAN ALTIMA SEDAN code possible symptoms?

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

|P0448 2009 NISSAN ALTIMA SEDAN code 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 2009 Nissan Altima Sedan - Evaporative Emission Control System Vent Control Circuit Close - AutoCodes.com

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|P0448 2009 NISSAN ALTIMA SEDAN code comments

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