P1801 2011 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 2
Quick Answer
When the engine is running at low or medium speed, the power valve is fully closed. Common causes include Faulty VIAS control solenoid valve 2, VIAS control solenoid valve circuit harness is open or shorted, VIAS control solenoid valve circuit poor electrical connection. 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 Faulty VIAS control solenoid valve 2, VIAS control solenoid valve circuit harness is open or shorted, VIAS control solenoid valve circuit poor electrical connection.
- 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.
Code P1801 2011 Nissan Altima Sedan Description
The surge tank and one-way valve are provided. When the engine is running at high speed, the Engine Control Module (ECM) sends the signal to the Variable Intake Air System (VIAS) control solenoid valve. This signal introduces the intake manifold vacuum into the power valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided independently for each cylinder. This shortened port length results in enhanced engine output with reduced suction resistance under high speeds.
What are the Possible Causes of the DTC P1801 2011 Nissan Altima Sedan?
- Faulty VIAS control solenoid valve 2
- VIAS control solenoid valve circuit harness is open or shorted
- VIAS control solenoid valve circuit poor electrical connection
How to Fix the DTC P1801 2011 Nissan Altima Sedan?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1801 2011 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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