AutoCodes – Nissan – P1800 2011 Nissan Pathfinder

P1800 2011 Nissan Pathfinder Code - Variable Intake Air System Control Solenoid Valve Circuit

Quick Answer

When the engine is running at low or medium speed, the power valve is fully closed. Common causes include Faulty Variable Intake Air System (VIAS) Control Solenoid Valve, 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: P1800 2011 Nissan Pathfinder indicates Variable Intake Air System Control Solenoid Valve Circuit.
Common causes: Common causes include Faulty Variable Intake Air System (VIAS) Control Solenoid Valve, 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.

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Code Popularity 4,974

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 29, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1800 2011 Nissan Pathfinder Description

When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the effective suction port length is equivalent to the total length of the intake manifold collector's suction port including the intake valve. This long suction port provides increased air intake which results in improved suction efficiency and higher torque generation.
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.
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. The Diagnostic Trouble Code (DTC) will be set when an excessively low or high voltage signal is sent to ECM through the valve

OBDII Code P1800 2011 Nissan Pathfinder - Variable Intake Air System Control Solenoid Valve Circuit - AutoCodes.com — P1800 2011 Nissan Pathfinder Code - Variable Intake Air System Control Solenoid Valve Circuit

What does this mean?

What are the Possible Causes of the DTC P1800 2011 Nissan Pathfinder?

Faulty Variable Intake Air System (VIAS) Control Solenoid Valve
VIAS Control Solenoid Valve circuit harness is open or shorted
VIAS Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P1800 2011 Nissan Pathfinder?

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 P1800 2011 Nissan Pathfinder 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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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 P1800 2011 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P1800 on a 2011 Nissan Pathfinder?

The common symptoms of OBDII code P1800 on a 2011 Nissan Pathfinder include rough idling, engine stalling, decreased fuel efficiency, and a possible reduction in overall engine performance.

2. What does the OBDII code P1800 indicate on a 2011 Nissan Pathfinder?

OBDII code P1800 on a 2011 Nissan Pathfinder indicates an issue with the Variable Intake Air System Control Solenoid Valve Circuit.

3. What are the possible causes of OBDII code P1800 on a 2011 Nissan Pathfinder?

Possible causes of OBDII code P1800 on a 2011 Nissan Pathfinder include a faulty Variable Intake Air System Control Solenoid Valve, wiring issues in the circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the Variable Intake Air System Control Solenoid Valve circuit on a 2011 Nissan Pathfinder?

To diagnose the Variable Intake Air System Control Solenoid Valve circuit on a 2011 Nissan Pathfinder, you can perform a visual inspection of the valve and its wiring, check for continuity in the circuit, and use an OBDII scanner to read the trouble codes.

5. Can I still drive my 2011 Nissan Pathfinder with OBDII code P1800?

It is not recommended to drive your 2011 Nissan Pathfinder with OBDII code P1800, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P1800 on my 2011 Nissan Pathfinder?

Repairing OBDII code P1800 on a 2011 Nissan Pathfinder may involve replacing the Variable Intake Air System Control Solenoid Valve, repairing any damaged wiring in the circuit, or reprogramming the Engine Control Module (ECM).

7. Is it possible to reset OBDII code P1800 on a 2011 Nissan Pathfinder without fixing the underlying issue?

While you can clear the code temporarily by resetting the ECM, the code is likely to reappear if the root cause of the problem is not addressed. It's essential to fix the issue to prevent further complications.

8. How much does it typically cost to repair OBDII code P1800 on a 2011 Nissan Pathfinder?

The cost of repairing OBDII code P1800 on a 2011 Nissan Pathfinder can vary depending on the cause of the issue, labor costs, and the price of replacement parts. It's advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P1800 on a 2011 Nissan Pathfinder?

While some DIY enthusiasts may have the skills to address OBDII code P1800 on a 2011 Nissan Pathfinder, it's a complex issue that may require specialized tools and knowledge. If you're unsure, it's best to seek the help of a professional mechanic.

10. How long does it take to repair OBDII code P1800 on a 2011 Nissan Pathfinder?

The time it takes to repair OBDII code P1800 on a 2011 Nissan Pathfinder can vary depending on the specific cause of the issue and the complexity of the repair. It's advisable to consult with a mechanic for a more accurate timeline.