Engine-Codes.com
Engine-Codes – Nissan – P1490 2002 Nissan Altima Sedan

P1490 2002 Nissan Altima Sedan Code - Vacuum Cut Valve Bypass Valve

Quick Answer

The P1490 code for a 2002 Nissan Altima Sedan refers to an issue with the Vacuum Cut Valve Bypass Valve. Common causes include Faulty Vacuum Cut Valve Bypass Valve, Vacuum leaks in the evaporative emission control system, Electrical issues such as a malfunctioning sensor or wiring. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1490 2002 Nissan Altima Sedan indicates Vacuum Cut Valve Bypass Valve.
Common causes
Common causes include Faulty Vacuum Cut Valve Bypass Valve, Vacuum leaks in the evaporative emission control system, Electrical issues such as a malfunctioning sensor or wiring.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 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 P1490 2002 Nissan Altima Sedan Description

The P1490 code for a 2002 Nissan Altima Sedan refers to an issue with the Vacuum Cut Valve Bypass Valve. This valve is a crucial component of the vehicle's evaporative emission control system, which helps to reduce harmful emissions by capturing and storing fuel vapors before they can escape into the atmosphere. The Vacuum Cut Valve Bypass Valve is responsible for controlling the flow of fuel vapors from the fuel tank to the engine, ensuring that the system operates efficiently.

OBDII Code P1490 2002 Nissan Altima Sedan - Vacuum Cut Valve Bypass Valve
P1490 2002 Nissan Altima Sedan Code - Vacuum Cut Valve Bypass Valve

Common Causes of P1490 2002 Nissan Altima Sedan

  1. Faulty Vacuum Cut Valve Bypass Valve
  2. Vacuum leaks in the evaporative emission control system
  3. Electrical issues such as a malfunctioning sensor or wiring
  4. Mechanical failure in the valve or related components
  5. Clogged or blocked fuel vapor lines

Symptoms of P1490 2002 Nissan Altima Sedan

  1. Check Engine Light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Difficulty starting the engine
  5. Increased emissions output

How to Fix P1490 2002 Nissan Altima Sedan

  1. Begin by diagnosing the specific cause of the P1490 code using a diagnostic scanner to pinpoint the issue with the Vacuum Cut Valve Bypass Valve.
  2. Inspect the valve and related components for any signs of damage, wear, or malfunction.
  3. Replace the Vacuum Cut Valve Bypass Valve if it is found to be faulty, ensuring that the new valve is properly installed and sealed.
  4. Check for any vacuum leaks in the evaporative emission control system and repair as necessary.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1490 2002 Nissan Altima Sedan

The typical repair costs for addressing a P1490 code related to the Vacuum Cut Valve Bypass Valve in a 2002 Nissan Altima Sedan can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P1490 2002 Nissan Altima Sedan

There is a factory service bulletin for the 2002 Nissan Altima:

2002 Nissan Altima Factory Service Bulletin OBDII Code P1490

When is the Code Detected?

An improper voltage signal is sent to ECM through vacuum cut valve bypass valve.

Need more information about the P1490 2002 Nissan Altima Sedan code?

Need more information on how to fix the P1490 2002 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1490 2002 Nissan Altima Sedan 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 P1490 2002 Nissan Altima Sedan Code

1. What does OBDII code P1490 on a 2002 Nissan Altima Sedan indicate?

Code P1490 refers to a fault with the Vacuum Cut Valve Bypass Valve in the vehicle's evaporative emission control system.

2. What are the common symptoms of a Vacuum Cut Valve Bypass Valve issue?

Common symptoms include difficulty starting the vehicle, rough idling, stalling, and the illumination of the Check Engine Light.

3. What are the possible causes of OBDII code P1490 on a 2002 Nissan Altima?

Potential causes include a faulty Vacuum Cut Valve Bypass Valve, damaged vacuum hoses, a clogged charcoal canister, or electrical issues within the system.

4. How can I diagnose a Vacuum Cut Valve Bypass Valve problem on my 2002 Nissan Altima?

Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, visually inspecting the vacuum hoses for damage, and checking the electrical connections to the valve.

5. Can I continue driving my 2002 Nissan Altima with OBDII code P1490?

It is not recommended to drive the vehicle with a P1490 code as it can lead to poor engine performance and potential emissions issues. It's best to address the problem promptly.

6. How can I repair a Vacuum Cut Valve Bypass Valve issue on my Nissan Altima?

Repairing the issue may involve replacing the faulty valve, repairing or replacing damaged vacuum hoses, cleaning or replacing the charcoal canister, or addressing any electrical faults.

7. Are there any DIY tips for fixing OBDII code P1490 on a 2002 Nissan Altima?

While some may attempt to replace the Vacuum Cut Valve Bypass Valve themselves, it's advisable to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

8. Will resetting the Check Engine Light resolve the P1490 code on my Nissan Altima?

Simply resetting the Check Engine Light will not fix the underlying issue causing code P1490. The problem must be diagnosed and repaired for the light to stay off permanently.

9. How much does it typically cost to repair a Vacuum Cut Valve Bypass Valve problem on a 2002 Nissan Altima?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Can a Vacuum Cut Valve Bypass Valve issue affect the overall performance of my 2002 Nissan Altima?

Yes, a malfunctioning Vacuum Cut Valve Bypass Valve can lead to poor engine performance, reduced fuel efficiency, and potential emissions problems if left unresolved.

Discuss the causes and fixes for P1490 2002 Nissan Altima Sedan OBDII Code

Submit a New Comment

Code P1490 2002 Nissan Altima Sedan comments

No comments found for this page.