Engine-Codes.com
Engine-Codes – Saturn – P0440 Saturn

P0440 Saturn Code - Evaporative Emission System

Quick Answer

The P0440 code for a Saturn indicates a problem with the vehicle's Evaporative Emission Control System (EVAP). Common causes include Loose or Faulty Gas Cap: A loose or faulty gas cap is one of the most common causes of the P0440 code, Leaking EVAP System Hoses: Cracked or damaged hoses in the EVAP system can lead to leaks and trigger the code, Faulty Purge Valve: A malfunctioning purge valve can cause issues with the EVAP system and trigger the P0440 code. 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
P0440 Saturn indicates Evaporative Emission System.
Common causes
Common causes include Loose or Faulty Gas Cap: A loose or faulty gas cap is one of the most common causes of the P0440 code, Leaking EVAP System Hoses: Cracked or damaged hoses in the EVAP system can lead to leaks and trigger the code, Faulty Purge Valve: A malfunctioning purge valve can cause issues with the EVAP system and trigger the P0440 code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0440 Saturn Description

The P0440 code for a Saturn indicates a problem with the vehicle's Evaporative Emission Control System (EVAP). The EVAP system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from being released into the atmosphere. When this code is triggered, it means that there is a leak in the system or a malfunction with one of its components.

OBDII Code P0440 Saturn - Evaporative Emission System
P0440 Saturn Code - Evaporative Emission System

Common Causes of P0440 Saturn

  1. Loose or Faulty Gas Cap: A loose or faulty gas cap is one of the most common causes of the P0440 code.
  2. Leaking EVAP System Hoses: Cracked or damaged hoses in the EVAP system can lead to leaks and trigger the code.
  3. Faulty Purge Valve: A malfunctioning purge valve can cause issues with the EVAP system and trigger the P0440 code.
  4. Faulty Vent Valve: A faulty vent valve can prevent the EVAP system from properly venting fuel vapors, triggering the code.

Symptoms of P0440 Saturn

  1. Check Engine Light: The most obvious symptom associated with the P0440 code is the illumination of the check engine light on the dashboard.
  2. Gasoline Smell: A noticeable gasoline smell inside or outside the vehicle could indicate a leak in the EVAP system.
  3. Rough Idle: A rough idle or stalling engine may occur if the EVAP system is not functioning properly.
  4. Failed Emissions Test: If the P0440 code is not addressed, it can lead to the vehicle failing emissions tests due to increased emissions.

How to Fix P0440 Saturn

  1. Check Gas Cap: Start by checking the gas cap to ensure it is tightened properly or replacing it if it is faulty.
  2. Inspect EVAP System Hoses: Inspect the EVAP system hoses for any cracks or damage and replace as necessary.
  3. Test Purge Valve: Test the purge valve to ensure it is functioning correctly and replace if needed.
  4. Test Vent Valve: Test the vent valve to ensure it is opening and closing properly, replacing it if necessary.
  5. Clear Codes: After repairing the issue, clear the diagnostic trouble codes and test drive the vehicle to ensure the problem has been resolved.

Cost to Fix P0440 Saturn

The cost of repairing the P0440 code on a Saturn can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of parts for this repair can range from $50 to $200, with labor costs adding an additional $100 to $200. Overall, you can expect to pay anywhere from $150 to $400 for resolving the P0440 code on your Saturn. It's important to note that these are rough estimates and actual costs may vary based on your location and the specific circumstances of your vehicle.

What does this mean?

Tech Notes for P0440 Saturn

The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0440 code.

When is the Code Detected?

The Evaporative Emission (EVAP) system is not able to build vacuum

Need more information about the P0440 Saturn code?

Need more information on how to fix the P0440 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0440 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 P0440 Saturn Code

No Frequently Asked Questions about P0440 Saturn Code found.

Discuss the causes and fixes for P0440 Saturn OBDII Code

Submit a New Comment

Code P0440 Saturn comments

No comments found for this page.