AutoCodes – Saturn – P0449 Saturn

P0449 Saturn Code - Evaporative Emission Vent Solenoid Valve Control Circuit

Quick Answer

The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0449 Saturn indicates Evaporative Emission Vent Solenoid Valve Control Circuit.
Common causes: Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 42,283

How popular is this code, among other codes? Medium

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 23, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0449 Saturn Description

The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. The Evaporative Emission Vent Solenoid Valve responds to signals from the Engine Control Module (ECM). Battery voltage is supplied to the EVAP vent solenoid valve through a fuse. The ECM grounds the EVAP Vent Solenoid Valve control circuit through an internal switch called a driver. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components. The ECM monitors the status of the driver. A scan tool will display the commanded state of the EVAP Vent Solenoid Valve as Not Venting (On) or Venting (Off). The Diagnostic Trouble Code (DTC) will be set when the ECM detects the EVAP vent solenoid valve control circuit is open within 0.25 s.

OBDII Code P0449 Saturn - Evaporative Emission Vent Solenoid Valve Control Circuit - AutoCodes.com — P0449 Saturn Code - Evaporative Emission Vent Solenoid Valve Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0449 Saturn?

Faulty Evaporative Emission Vent Solenoid Valve
Evaporative Emission Vent Solenoid Valve harness is open or shorted
Evaporative Emission Vent Solenoid Valve electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0449 Saturn?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0449 Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0449 Saturn code?

Need more information on how to fix the P0449 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0449 Saturn code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0449 Saturn Code

1. What are the common symptoms of OBDII code P0449 in a Saturn related to the Evaporative Emission Vent Solenoid Valve Control Circuit?

The common symptoms include the check engine light being illuminated, rough idling, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are the typical causes of OBDII code P0449 in a Saturn?

The code P0449 is often triggered by a faulty or stuck Evaporative Emission Vent Solenoid Valve, damaged wiring in the control circuit, or a problem with the vehicle's computer system.

3. How can I diagnose the issue related to OBDII code P0449 in my Saturn?

To diagnose the issue, you can use an OBDII scanner to read the code and further investigate by checking the wiring connections, inspecting the solenoid valve, and testing the voltage in the control circuit.

4. Can I continue driving my Saturn with OBDII code P0449 present?

While the vehicle may still be operational with the code present, it is recommended to address the issue promptly to prevent potential damage to other components and ensure optimal performance.

5. What repair options are available for fixing OBDII code P0449 in a Saturn?

Repair options may include replacing the Evaporative Emission Vent Solenoid Valve, repairing damaged wiring, resetting the code with a scanner, or seeking assistance from a professional mechanic.

6. Are there any DIY tips for resolving OBDII code P0449 in my Saturn?

DIY tips may include checking and cleaning the connections to the solenoid valve, inspecting for visible damage or corrosion in the wiring, and ensuring all components are securely in place.

7. How critical is it to address OBDII code P0449 in a timely manner?

It is important to address the code promptly to maintain the vehicle's emissions control system's efficiency and prevent potential issues with fuel economy and engine performance.

8. Can a faulty gas cap trigger OBDII code P0449 in a Saturn?

While a faulty gas cap can lead to related codes, OBDII code P0449 specifically pertains to issues with the Evaporative Emission Vent Solenoid Valve Control Circuit.

9. What role does the Evaporative Emission Vent Solenoid Valve play in the vehicle's emissions system?

The Evaporative Emission Vent Solenoid Valve helps control the flow of vapors from the fuel tank, ensuring proper emissions control and preventing harmful gases from escaping into the environment.

10. How can I prevent OBDII code P0449 from recurring in my Saturn?

Regular maintenance, timely repairs of related components, and ensuring proper installation of the solenoid valve can help prevent the recurrence of OBDII code P0449 in your Saturn.