p0449
Easy Fix
Chevrolet · SUVs
Evaporative Emission (EVAP) Vent Valve/Solenoid Circuit Malfunction
Quick Answer
Error code P0449 on your Chevrolet SUVs means: Evaporative Emission (EVAP) Vent Valve/Solenoid Circuit Malfunction. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
CL14636CL14606Blazer LT 2024Blazer Premier 2024Blazer RS 2024Equinox Activ 2024Equinox LT 2024Equinox RS 2024Suburban High Country 2024Suburban LS 2024Suburban LT 2024Suburban Premier 2024Suburban RST 2024Tahoe High Country 2024Tahoe LS 2024Tahoe LT 2024Tahoe Premier 2024Tahoe RST 2024Tahoe Z71 2024Trailblazer Activ 2024Trailblazer LS 2024Trailblazer LT 2024Trailblazer RS 2024Traverse LS 2024Traverse LT 2024Traverse Premier 2024Traverse RS 2024Traverse Z71 2024Trax Activ 2024Trax LS 2024Trax LT 2024Trax RS 2024CL14526CL14506CK10906CK10706CL14456CL14806CL14416
Likely Causes
How to Fix It
1
Locate the EVAP vent valve solenoid near the charcoal canister (typically near the rear axle)
2
Inspect the wiring and connector for corrosion, damage, or loose pins
3
Test vent valve solenoid resistance with a multimeter (expect 20-30 ohms)
4
Apply 12V to the solenoid to verify it clicks and operates properly
5
Replace the vent valve solenoid if resistance is out of spec or it does not actuate
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
EVAP vent valve solenoid
Wiring repair connectors
Electrical contact cleaner
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