Parts
$30-120
P0449 — EVAP Vent Valve / Solenoid Circuit
SAFEIs it safe to drive? Generally OK to keep driving — sort it out at your convenience.
What P0449 means
The EVAP canister vent solenoid has failed or is sticking, or its circuit is faulty. Emissions-only; commonly debris-fouled on GM trucks/SUVs.
Most likely causes (in order)
- Vent solenoid failed/stuck ($30-120)
- Debris/dirt in the valve
- Wiring/connector corrosion
- Charcoal canister
Symptoms you might notice
- check engine light
What to check first
Inspect/clean or replace the vent solenoid. On GM, P0449 with P0455/P0496 often points to the vent valve or purge valve.
Repair cost & difficulty
Labor
0.5-1.5 hr
Difficulty
Moderate