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Engine-Codes – Nissan – P1801 2012 Nissan Altima Sedan

P1801 2012 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 2

Quick Answer

The P1801 code for a 2012 Nissan Altima Sedan specifically refers to an issue with the Variable Intake Air System Control Solenoid Valve 2. Common causes include Faulty wiring harness or connector, Stuck or clogged solenoid valve, Vacuum leak 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 2012 Nissan Altima Sedan indicates Variable Intake Air System Control Solenoid Valve 2.
Common causes
Common causes include Faulty wiring harness or connector, Stuck or clogged solenoid valve, Vacuum leak 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 11, 2024
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Code P1801 2012 Nissan Altima Sedan Description

The P1801 code for a 2012 Nissan Altima Sedan specifically 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 or fails to operate correctly, it can have a significant impact on the vehicle's performance.

OBDII Code P1801 2012 Nissan Altima Sedan - Variable Intake Air System Control Solenoid Valve 2
P1801 2012 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 2

Common Causes of P1801 2012 Nissan Altima Sedan

  1. Faulty wiring harness or connector
  2. Stuck or clogged solenoid valve
  3. Vacuum leak in the intake system
  4. Malfunctioning intake air control solenoid
  5. Issues with the engine control module

Symptoms of P1801 2012 Nissan Altima Sedan

  1. Reduced engine power
  2. Poor fuel efficiency
  3. Rough idling or engine vibrations
  4. Engine stalling or misfiring
  5. Check Engine Light illuminated on the dashboard

How to Fix P1801 2012 Nissan Altima Sedan

  1. Diagnose the issue using a scan tool to confirm the P1801 code and identify the specific cause of the problem.
  2. Inspect the Variable Intake Air System Control Solenoid Valve 2 for any visible damage or signs of wear.
  3. Test the solenoid valve for proper operation using a multimeter to check for continuity and correct voltage.
  4. Replace the faulty solenoid valve if necessary, ensuring that the new part is compatible with the vehicle's make and model.
  5. Clear the diagnostic trouble codes and reset the vehicle's onboard computer to ensure the issue has been resolved.

Cost to Fix P1801 2012 Nissan Altima Sedan

The typical repair costs for addressing a P1801 code related to the Variable Intake Air System Control Solenoid Valve 2 can vary depending on the severity of the issue and the specific components that need to be replaced. In general, the cost of parts for a new solenoid valve can range from $50 to $200, while the labor costs for the repair process can be estimated at around $100 to $300. Keep in mind that these are rough estimates, and the actual costs may vary based on the location of the repair shop, the vehicle's make and model, and the local labor rates. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost 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

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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 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P1801 in a 2012 Nissan Altima Sedan related to the Variable Intake Air System Control Solenoid Valve 2?

The common symptoms include rough idle, decreased engine performance, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P1801 in a 2012 Nissan Altima Sedan?

The code P1801 typically indicates a fault with the Variable Intake Air System Control Solenoid Valve 2, which can be caused by wiring issues, a faulty solenoid valve, or a problem with the intake system.

3. How can I diagnose the Variable Intake Air System Control Solenoid Valve 2 issue triggering OBDII code P1801 in my 2012 Nissan Altima Sedan?

A thorough inspection of the solenoid valve and its wiring for any visible damage, as well as conducting a continuity test to check for electrical continuity, can help diagnose the problem.

4. Can I still drive my 2012 Nissan Altima Sedan with OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2?

While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to prevent further damage to the engine or other components.

5. What are some repair tips for fixing OBDII code P1801 in a 2012 Nissan Altima Sedan caused by the Variable Intake Air System Control Solenoid Valve 2?

Repair tips include checking and repairing any damaged wiring, testing and replacing the faulty solenoid valve if necessary, and ensuring proper installation for a reliable fix.

6. How much does it typically cost to repair OBDII code P1801 in a 2012 Nissan Altima Sedan related to the Variable Intake Air System Control Solenoid Valve 2?

The cost of repair can vary depending on the extent of the issue, the need for replacement parts, and labor costs, but it is advisable to consult a professional for an accurate estimate.

7. Can resetting the OBDII system clear the P1801 code in a 2012 Nissan Altima Sedan caused by the Variable Intake Air System Control Solenoid Valve 2?

While resetting the system may temporarily clear the code, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

8. Are there any preventive measures to avoid OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2 in a 2012 Nissan Altima Sedan?

Regular maintenance, such as inspecting the intake system components and addressing any issues promptly, can help prevent the occurrence of code P1801 in the future.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1801 in a 2012 Nissan Altima Sedan related to the Variable Intake Air System Control Solenoid Valve 2?

While some aspects of the repair may be manageable for a DIY enthusiast, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

10. Is it necessary to replace the Variable Intake Air System Control Solenoid Valve 2 when dealing with OBDII code P1801 in a 2012 Nissan Altima Sedan?

If the solenoid valve is found to be faulty during diagnosis, it is advisable to replace it to rectify the issue triggering code P1801 and restore the proper functioning of the intake air system.

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