P1801 Infiniti 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 Infiniti 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 Infiniti 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 Infiniti?
- 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 Infiniti?
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 Infiniti 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 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.
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