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P0449 GMC - Evaporative Emission Vent Valve Solenoid Malfunction

Possible causes
- Vacuum leaks, damaged hoses or improper routing
- EVAP system - Check fuel cap, canister, valves or components
- Faulty purge or vent solenoids
- Check connector and wiring
- Fuel saturated vapor canister
- Failed EVAP vent solenoid
What does this mean? What does this mean?
Tech notes
Check Engine Light Diag EVAP Codes

User Submitted Video
What does this mean? What does this mean?
When is the code detected?
The Engine Control Module (ECM) has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0449 Gmc Description

The Engine Control Module (ECM) monitors the Evaporative Emission System (EVAP) Vent Valve/Solenoid system wiring for opens or shorts.

P0449 Gmc Information for specific Gmc models
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