AutoCodes – Nissan – P1800 2007 Nissan Pathfinder

P1800 2007 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 2007 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 6,816

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
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Code P1800 2007 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 2007 Nissan Pathfinder - Variable Intake Air System Control Solenoid Valve Circuit - AutoCodes.com — P1800 2007 Nissan Pathfinder Code - Variable Intake Air System Control Solenoid Valve Circuit

What does this mean?

What are the Possible Causes of the DTC P1800 2007 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 2007 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 2007 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 2007 Nissan Pathfinder Code

1. What is OBDII code P1800 on a 2007 Nissan Pathfinder?

The P1800 code indicates a malfunction in the Variable Intake Air System Control Solenoid Valve Circuit.

2. What are common symptoms of OBDII code P1800 in a 2007 Nissan Pathfinder?

Common symptoms include rough idling, engine hesitation, loss of power, and potentially decreased fuel efficiency.

3. What are possible causes of OBDII code P1800 on a 2007 Nissan Pathfinder?

Potential causes include a faulty Variable Intake Air System (VIAS) control solenoid valve, damaged wiring or connectors in the circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the issue causing OBDII code P1800 on my 2007 Nissan Pathfinder?

Diagnosis typically involves checking the VIAS control solenoid valve for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to analyze data from the ECM.

5. Can I drive my 2007 Nissan Pathfinder with OBDII code P1800?

It is not recommended to drive the vehicle with a P1800 code present, as it can lead to further engine damage and potential safety issues. It's best to address the underlying problem promptly.

6. How can I repair OBDII code P1800 on a 2007 Nissan Pathfinder?

Repairing the P1800 code may involve replacing the VIAS control solenoid valve, repairing or replacing damaged wiring or connectors, or reprogramming the ECM as necessary.

7. Is it possible to clear OBDII code P1800 on a 2007 Nissan Pathfinder without fixing the issue?

Clearing the code without addressing the underlying problem is not recommended, as the issue will likely resurface, potentially causing more severe problems in the future.

8. How much does it cost to fix OBDII code P1800 on a 2007 Nissan Pathfinder?

The cost of fixing a P1800 code can vary depending on the specific cause of the issue, but it may range from around $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix OBDII code P1800 on a 2007 Nissan Pathfinder?

Depending on the DIYer's skill level and access to tools, it may be possible to address the P1800 code by replacing the VIAS control solenoid valve or repairing wiring. However, some repairs may require professional assistance.

10. How can I prevent OBDII code P1800 from recurring on my 2007 Nissan Pathfinder?

Regular maintenance, such as checking and replacing worn components like the VIAS control solenoid valve, and addressing any engine performance issues promptly can help prevent the P1800 code from reoccurring.