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P0449 on CHEVROLET MALIBU

EVAP System Vent Valve Control Circuit/Open

NHTSA Reports
2
Severity
Medium
Most Affected
2009, 2017
Crashes / Fires
0 / 0
Source: NHTSA Complaints Database · SAE J2012
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What P0449 Means on Your CHEVROLET MALIBU

P0449 is a diagnostic trouble code indicating: EVAP System Vent Valve Control Circuit/Open. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 CHEVROLET MALIBU owners have reported this issue to NHTSA across model years 2009-2017. Most reports come from the 2009, 2017 model years. The most commonly reported component is Steering,Suspension,Electronic Stability Control (Esc) (50.0% of reports).

Real CHEVROLET MALIBU Owner Reports

Source: NHTSA Complaints Database

"When going over any bump or turning the front end shakes and makes a clacking noise. esc is off. traction control is always off."

— 2009 CHEVROLET MALIBU owner · STEERING,SUSPENSION,ELECTRONIC STABILITY CONTROL (ESC) · Filed 09/05/2020

"The warning light comes on and off and is showing (P0498/P0449) which is the evaporative emission system vent control electrical circuit signal has low voltage for a predetermined period of time."

— 2017 CHEVROLET MALIBU owner · UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM · Filed 03/07/2024

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1
'09
1
'17

Common Causes on CHEVROLET MALIBU

Based on NHTSA complaint component analysis for this vehicle.

STEERING,SUSPENSION,ELECTRONIC STABILITY CONTROL (ESC) 50%
UNKNOWN or OTHER,FUEL/PROPULSION SYSTEM 50%

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.

  2. 2
    Get a proper diagnosis

    A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.

  3. 3
    Compare repair quotes

    Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0449 mean on a CHEVROLET MALIBU? ▾
P0449 indicates: EVAP System Vent Valve Control Circuit/Open. This is a emission controls code. 2 CHEVROLET MALIBU owners have reported this to NHTSA.
What are the most common causes of P0449 on CHEVROLET MALIBU? ▾
Based on 2 NHTSA reports, the most commonly cited components are: Steering,Suspension,Electronic Stability Control (Esc), Unknown Or Other,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.
Is P0449 serious on my CHEVROLET MALIBU? ▾
Of 2 NHTSA reports for this code on CHEVROLET MALIBU, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.
What should I do if my CHEVROLET MALIBU shows P0449? ▾
1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P0449 on Other Vehicles

HYUNDAI SONATA
3 reports
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