Already Replaced the Vapor Canister Purge Solenoid-No Change, Replaced Gas Cap- No Change Ordered a Vapor Canister Vent Solenoid also according to Code as a Replacement Part
My mechanic can’t find where this part goes on my 02 Buick Lasabre. Is there anyone that can hello
Malfunction
The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions-dictated by engine temperature, speed, and load-the EVAP system stores and purges these captured fuel vapors back into the combustion process. The carbon canister, which stores the raw fuel vapors, utilizes a vent valve that allows fresh air to enter the EVAP system. This displaces the fuel vapor as it's purged into the combustion process.
Code P0449 indicates that the evaporative control (EVAP) system vent valve solenoid is malfunctioning. This can be caused by either too little or too much electrical resistance or a mechanical problem with the vent valve itself.
P0449 Symptoms
Common Problems That Trigger the P0449 Code
Common Misdiagnoses
Polluting Gases Expelled
Good job Marvin! I have this problem where raw fuel gets to the purge valve and when computer starts venting through the Purge Valve it allows the raw fuel into the intake manifold and floods the engine, this only happens when the fuel tank is full. Note: there is No Codes! I see that you mentioned a vapor canister vent valve, I did try a new purge valve but that's not the problem! I hhaven't looked for the canister, I imagine it's accessible?
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SOURCE: HAVE A TROUBLESHOOTING MESSAGE PO446
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
The vehicle control module (VCM) monitors the performance of the evaporative
emission (EVAP) system by applying a predetermined level of vacuum to the
EVAP system and monitors the vacuum decay rate. The VCM sets this diagnostic
trouble code (DTC) if the vacuum decay rate is more than a predetermined
value. The VCM monitors the amount of vacuum and the amount of pressure
in the EVAP system by monitoring the fuel tank pressure sensor. For
this DTC, the VCM turns ON both the EVAP purge valve and the EVAP vent
valve when the Conditions for Running the DTC are met. This applies
an engine vacuum to a closed EVAP system. The VCM turns OFF both the
EVAP purge valve and the EVAP vent valve when the system reaches a correct
amount of vacuum. The EVAP system should quickly RELEASE the vacuum
in the EVAP system with the EVAP purge valve OFF and the EVAP vent valve
OFF (open). This test indicates a blocked or restricted EVAP vent path
if the EVAP system fails to release the vacuum quickly enough.
SOURCE: where is and how to
its below the coil pack on back of the engine. Once you find it, you can figure out how to change it. How do you know its bad?
SOURCE: I have a 2008 Chevrolet
Your dealership service department has a book on the vehicle that they will let you copy a page from.
SOURCE: p0446 code 1998 gmc jimmy how do I fix this? where is it located?
A fault code is not located anywhere except in memory of the computer. A fault code indicates a problem exists int a system, a system contains many parts.
SOURCE: 2000 Buick LeSabre, canister purge solenoid
It is located near the fuel tank on a tray under the car.
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