Causes and Fixes P0449 Code Evaporative Emission System Vent Valve/Solenoid Circuit
How to fix P0449 Code Evaporative Emission System Vent Valve/Solenoid Circuit
A P0449 error code is set when the computer (ECM/PCM) reads an issue with the vent valve, which is a part of the Evap system for emissions.
The vent valve is often built into the charcoal canister but can be separate.
While Evap systems are similar, they can be designed differently, so it is best to get a diagram for the year, make, and model of the vehicle.
Possible Causes of a P0449 Code
Bad Vent Valve or Vent Valve Wiring Issue
Bad Charcoal Canister
Less Likely Causes of a P0449 Code: (Will usually get another code)
Bad Gas Cap or Inlet
Evap Leak
Purge Valve
Pressure Sensor
By using this information user assumes all risk of use.
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