Engine-Codes.com
Engine-Codes – Infiniti – P1801 Infiniti

P1801 Infiniti Code - Variable Intake Air System Control Solenoid Valve 2

Quick Answer

The P1801 Infiniti diagnostic trouble code refers to an issue with the Variable Intake Air System Control Solenoid Valve 2. Common causes include Clogged or dirty Variable Intake Air System Control Solenoid Valve, Electrical issues such as a short circuit or wiring damage, Vacuum leaks in the intake system. 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
P1801 Infiniti indicates Variable Intake Air System Control Solenoid Valve 2.
Common causes
Common causes include Clogged or dirty Variable Intake Air System Control Solenoid Valve, Electrical issues such as a short circuit or wiring damage, Vacuum leaks in the intake system.
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 06, 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 P1801 Infiniti Description

The P1801 Infiniti diagnostic trouble code refers to an issue with the Variable Intake Air System Control Solenoid Valve 2. This solenoid valve is a crucial component of the vehicle's intake system, responsible for controlling the flow of air into the engine. When this valve malfunctions, it can lead to a disruption in the air-fuel mixture, affecting the engine's performance and efficiency. Additionally, a faulty solenoid valve can trigger the check engine light to illuminate on the dashboard.

OBDII Code P1801 Infiniti - Variable Intake Air System Control Solenoid Valve 2
P1801 Infiniti Code - Variable Intake Air System Control Solenoid Valve 2

Common Causes of P1801 Infiniti

  1. Clogged or dirty Variable Intake Air System Control Solenoid Valve.
  2. Electrical issues such as a short circuit or wiring damage.
  3. Vacuum leaks in the intake system.
  4. Failure of the solenoid valve due to normal wear and tear.
  5. Issues with the engine control module (ECM) affecting the solenoid valve's operation.

Symptoms of P1801 Infiniti

  1. Check engine light is illuminated on the dashboard.
  2. Decreased engine performance and power.
  3. Engine misfires or rough idling.
  4. Reduced fuel efficiency.
  5. Difficulty starting the engine.

How to Fix P1801 Infiniti

  1. Begin by diagnosing the specific cause of the issue using a scan tool to confirm the P1801 code.
  2. Inspect the Variable Intake Air System Control Solenoid Valve for any signs of damage or clogging. Clean or replace the valve as necessary.
  3. Check the electrical connections and wiring related to the solenoid valve for any damage or corrosion. Repair or replace any faulty components.
  4. Inspect the intake system for vacuum leaks and address any leaks found.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1801 Infiniti

The typical repair costs for addressing a P1801 Infiniti code related to the Variable Intake Air System Control Solenoid Valve 2 can range from $150 to $400, including parts and labor. However, it's important to note that repair costs can vary depending on the location, vehicle make and model, and the specific work required. Additionally, labor rates at auto repair shops can vary between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships. It is recommended to obtain quotes from local shops for a more accurate estimate.

When is the Code Detected?

The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to ON/OFF signals from the ECM. When the solenoid is off, the vacuum signal from the intake manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and feeds the vacuum signal to the power valve actuator. An excessively low or high voltage signal is sent to ECM through the valve

Need more information about the P1801 Infiniti code?

Need more information on how to fix the P1801 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1801 Infiniti 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 P1801 Infiniti Code

1. What are the common symptoms of OBDII code P1801 in an Infiniti related to the Variable Intake Air System Control Solenoid Valve 2?

The common symptoms include rough idling, decreased engine performance, and potential stalling.

2. What could be causing OBDII code P1801 to appear in an Infiniti, specifically related to the Variable Intake Air System Control Solenoid Valve 2?

Possible causes include a faulty solenoid valve, wiring issues, or a problem with the intake air control system.

3. How can I diagnose the Variable Intake Air System Control Solenoid Valve 2 issue triggering OBDII code P1801 on my Infiniti?

A thorough inspection of the solenoid valve, wiring connections, and intake air system components is recommended. Using an OBDII scanner for further diagnostics is also advisable.

4. Is it safe to continue driving with OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2 in my Infiniti?

It is not recommended to drive for an extended period with this code unresolved, as it can lead to further engine damage and potential safety hazards.

5. How can I repair OBDII code P1801 in my Infiniti caused by issues with the Variable Intake Air System Control Solenoid Valve 2?

Repair options may include replacing the solenoid valve, repairing or replacing damaged wiring, or addressing any other underlying issues within the intake air system.

6. Can cleaning the Variable Intake Air System Control Solenoid Valve 2 help resolve OBDII code P1801 in an Infiniti?

Cleaning the valve may temporarily address the issue if dirt or debris is causing the malfunction, but a thorough inspection and potential replacement are usually recommended for a lasting solution.

7. Are there any preventive maintenance tips to avoid encountering OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2 in my Infiniti?

Regularly checking and maintaining the intake air system components, including the solenoid valve, can help prevent issues that lead to this error code.

8. Will resetting the OBDII system clear the P1801 code linked to the Variable Intake Air System Control Solenoid Valve 2 in my Infiniti?

While resetting the system may temporarily clear the code, it is crucial to address the root cause of the issue to prevent the code from reappearing.

9. How much does it typically cost to repair OBDII code P1801 caused by the Variable Intake Air System Control Solenoid Valve 2 in an Infiniti?

The repair costs can vary depending on the extent of the issue and whether parts need to be replaced. It is advisable to consult with a mechanic for an accurate estimate.

10. Can a DIY enthusiast with automotive knowledge fix OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2 in an Infiniti?

While some experienced DIYers may be able to address this issue, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the problem is fully resolved.

Discuss the causes and fixes for P1801 Infiniti OBDII Code

Submit a New Comment

Code P1801 Infiniti comments

No comments found for this page.