P0449
Low SeverityEVAP Vent Solenoid Control Circuit
EVAP System
What Does P0449 Mean?
Vent solenoid control circuit has a fault. Very common on GM trucks.
Common Fix
Replace vent solenoid
Estimated Cost (DIY)
$20 - $50
Symptoms
- ⚠️Check engine light
- ⚠️Failed emissions
Common Causes
Failed vent solenoidlikely
Corroded connectorpossible
Wiring damage from road debrispossible
How to Diagnose P0449
- 1Inspect vent solenoid (usually near rear of vehicle)
- 2Check connector for corrosion
- 3Test solenoid operation
- 4Replace solenoid
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Shop OBD2 Scanners on Amazon →Frequently Asked Questions
- Is P0449 common on GM trucks?
- Extremely common on Chevy Silverado, GMC Sierra, and other GM trucks. The vent solenoid near the fuel tank fails frequently.
- Is it easy to replace?
- Yes — it is behind the rear tire or near the fuel tank. 15-minute job with basic tools.