Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
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
To diagnose the P0448 2009 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
EVAP canister vent control valve remains closed under specified driving conditions.
Need more information on how to fix the P0448 2009 Nissan Altima Sedan code? Get Access to Factory Service Manuals
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