AutoCodes – Nissan – P1800 2012 Nissan Pathfinder

P1800 2012 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 2012 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 4,633

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 2012 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 2012 Nissan Pathfinder - Variable Intake Air System Control Solenoid Valve Circuit - AutoCodes.com — P1800 2012 Nissan Pathfinder Code - Variable Intake Air System Control Solenoid Valve Circuit

What does this mean?

What are the Possible Causes of the DTC P1800 2012 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 2012 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 2012 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 2012 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P1800 in a 2012 Nissan Pathfinder?

The common symptoms of OBDII code P1800 in a 2012 Nissan Pathfinder include rough idling, reduced engine performance, and possibly stalling.

2. What does the OBDII code P1800 on a 2012 Nissan Pathfinder indicate?

OBDII code P1800 on a 2012 Nissan Pathfinder indicates a malfunction in the Variable Intake Air System Control Solenoid Valve Circuit.

3. What are the possible causes of OBDII code P1800 in a 2012 Nissan Pathfinder?

Possible causes of OBDII code P1800 in a 2012 Nissan Pathfinder include a faulty solenoid valve, wiring issues, or a malfunctioning engine control module (ECM).

4. How can I diagnose the Variable Intake Air System Control Solenoid Valve Circuit issue in my 2012 Nissan Pathfinder?

Diagnosing the Variable Intake Air System Control Solenoid Valve Circuit issue in a 2012 Nissan Pathfinder involves checking the solenoid valve, inspecting the wiring for damage, and testing the ECM for proper function.

5. Can I continue to drive my 2012 Nissan Pathfinder with OBDII code P1800?

It is not recommended to continue driving your 2012 Nissan Pathfinder with OBDII code P1800, as it can lead to further engine damage and potential safety hazards.

6. How can I repair OBDII code P1800 in a 2012 Nissan Pathfinder?

Repairing OBDII code P1800 in a 2012 Nissan Pathfinder may involve replacing the faulty solenoid valve, repairing any damaged wiring, or reprogramming the ECM.

7. Is it possible to reset the OBDII code P1800 in a 2012 Nissan Pathfinder by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it is important to address the underlying issue causing OBDII code P1800 in a 2012 Nissan Pathfinder to prevent it from reoccurring.

8. Can a DIY enthusiast fix OBDII code P1800 in a 2012 Nissan Pathfinder?

A DIY enthusiast with the necessary tools and knowledge may be able to fix OBDII code P1800 in a 2012 Nissan Pathfinder, but it is recommended to consult a professional mechanic for accurate diagnosis and repair.

9. How much does it cost to repair OBDII code P1800 in a 2012 Nissan Pathfinder?

The cost to repair OBDII code P1800 in a 2012 Nissan Pathfinder can vary depending on the specific issue, parts needed, and labor costs. It is best to obtain quotes from local mechanics or dealerships for an accurate estimate.

10. How often does OBDII code P1800 occur in a 2012 Nissan Pathfinder?

OBDII code P1800 in a 2012 Nissan Pathfinder is not extremely common, but it can occur due to various factors such as age, mileage, and maintenance history of the vehicle.