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P1801 2011 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 2

Quick Answer

The P1801 code for a 2011 Nissan Altima Sedan specifically refers to an issue with the Variable Intake Air System Control Solenoid Valve 2. Common causes include Electrical issues such as a faulty solenoid or wiring, Mechanical failure or obstruction in the solenoid valve, Accumulated dirt or debris affecting valve operation. 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 2011 Nissan Altima Sedan indicates Variable Intake Air System Control Solenoid Valve 2.
Common causes
Common causes include Electrical issues such as a faulty solenoid or wiring, Mechanical failure or obstruction in the solenoid valve, Accumulated dirt or debris affecting valve operation.
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
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Code P1801 2011 Nissan Altima Sedan Description

The P1801 code for a 2011 Nissan Altima Sedan specifically refers to an issue with the Variable Intake Air System Control Solenoid Valve 2. This valve plays a crucial role in controlling the amount of air that enters the engine for combustion, based on factors such as engine speed and load. The valve is responsible for adjusting the length of the intake manifold runners, optimizing air flow and improving engine performance and fuel efficiency.

OBDII Code P1801 2011 Nissan Altima Sedan - Variable Intake Air System Control Solenoid Valve 2
P1801 2011 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 2

Common Causes of P1801 2011 Nissan Altima Sedan

  1. Electrical issues such as a faulty solenoid or wiring
  2. Mechanical failure or obstruction in the solenoid valve
  3. Accumulated dirt or debris affecting valve operation
  4. Corrosion or damage to the valve components
  5. Poor maintenance or lack of regular inspections

Symptoms of P1801 2011 Nissan Altima Sedan

  1. Reduced engine power
  2. Rough idling or erratic engine behavior
  3. Hesitation or lack of response during acceleration
  4. Decreased fuel efficiency
  5. Engine stalling or failure to start

How to Fix P1801 2011 Nissan Altima Sedan

  1. Diagnose the specific issue with the Variable Intake Air System Control Solenoid Valve 2 using a diagnostic scanner to retrieve trouble codes and perform component testing.
  2. Inspect the solenoid valve for any visible damage, corrosion, or obstructions that may be affecting its operation.
  3. Clean the valve and surrounding components to remove any dirt or debris that could be impeding proper function.
  4. Test the electrical circuitry to ensure the solenoid receives the correct signals and voltage for operation.
  5. Replace the Variable Intake Air System Control Solenoid Valve 2 if it is found to be faulty or beyond repair.

Cost to Fix P1801 2011 Nissan Altima Sedan

The typical repair costs for addressing a P1801 code related to the Variable Intake Air System Control Solenoid Valve 2 in a 2011 Nissan Altima Sedan can range from $150 to $400, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary significantly. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing. It's advisable to obtain quotes from multiple sources to get a more accurate estimate based on your location and vehicle specifics.

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 2011 Nissan Altima Sedan Code

1. What does OBDII code P1801 on a 2011 Nissan Altima Sedan indicate?

The code P1801 relates to an issue with the Variable Intake Air System Control Solenoid Valve 2 in the vehicle.

2. What are the common symptoms of a Variable Intake Air System Control Solenoid Valve 2 problem in a 2011 Nissan Altima Sedan?

Common symptoms include rough idling, loss of power, decreased fuel efficiency, and potential stalling.

3. What are the possible causes of OBDII code P1801 in a 2011 Nissan Altima Sedan?

Causes of this code can include a faulty solenoid valve, wiring issues, or a problem with the intake system components.

4. How can I diagnose the Variable Intake Air System Control Solenoid Valve 2 issue in my 2011 Nissan Altima Sedan?

Using an OBDII scanner to retrieve the code and inspecting the solenoid valve, wiring, and connections are crucial steps in diagnosing the problem.

5. Can I continue driving my 2011 Nissan Altima Sedan with OBDII code P1801?

It is not recommended to drive the vehicle with this code as it can lead to further damage or potential safety hazards.

6. How can I repair the Variable Intake Air System Control Solenoid Valve 2 problem in my 2011 Nissan Altima Sedan?

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

7. Is it possible to reset the OBDII code P1801 on a 2011 Nissan Altima Sedan without fixing the underlying issue?

Resetting the code without fixing the problem will only temporarily clear the error code, and it is likely to reappear once the issue persists.

8. Are there any preventive maintenance tips to avoid OBDII code P1801 in a 2011 Nissan Altima Sedan?

Regularly inspecting and maintaining the intake system components, including the solenoid valve, can help prevent issues that trigger this code.

9. Can a DIY enthusiast without much automotive experience fix the Variable Intake Air System Control Solenoid Valve 2 problem in a 2011 Nissan Altima Sedan?

While some may attempt the repair, it is recommended to have a professional mechanic handle the diagnosis and repair of this specific issue due to its complexity.

10. How much can I expect to pay for repairing OBDII code P1801 related to the Variable Intake Air System Control Solenoid Valve 2 in a 2011 Nissan Altima Sedan?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

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