For Shop Owners

P0449 GMC - Evaporative Emission Vent Valve Solenoid Malfunction

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3 What does this mean?

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?

Tech notes

User Submitted Video
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. The ECM sets the OBDII code when EVAP Vent Valve/Solenoid is not to factory specifications.
OBDII Code P0449 Gmc - Evaporative Emission Vent Valve Solenoid Malfunction -

P0449 GMC Information for specific Gmc models

Need more help?

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P0449 GMC Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0449 Gmc code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 1
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 08-17-2017

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