AutoCodes – Nissan – P1800 2012 Nissan Altima Sedan

P1800 2012 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 1

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 Altima Sedan indicates Variable Intake Air System Control Solenoid Valve 1.
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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 7,257

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1800 2012 Nissan Altima Sedan 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 Altima Sedan - Variable Intake Air System Control Solenoid Valve 1 - AutoCodes.com — P1800 2012 Nissan Altima Sedan Code - Variable Intake Air System Control Solenoid Valve 1

What does this mean?

What are the Possible Causes of the DTC P1800 2012 Nissan Altima Sedan?

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 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 P1800 2012 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.

Need more information about the P1800 2012 Nissan Altima Sedan code?

Need more information on how to fix the P1800 2012 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1800 2012 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area

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 Altima Sedan Code

1. What does OBDII code P1800 on a 2012 Nissan Altima Sedan indicate?

The OBDII code P1800 on a 2012 Nissan Altima Sedan refers to an issue with the Variable Intake Air System Control Solenoid Valve 1.

2. What are common symptoms of a Variable Intake Air System Control Solenoid Valve 1 problem?

Common symptoms of a Variable Intake Air System Control Solenoid Valve 1 issue include rough idling, poor engine performance, and potential stalling.

3. What causes the OBDII code P1800 on a 2012 Nissan Altima Sedan?

The OBDII code P1800 on a 2012 Nissan Altima Sedan is typically caused by a malfunctioning Variable Intake Air System Control Solenoid Valve 1 or related wiring issues.

4. How can I diagnose a Variable Intake Air System Control Solenoid Valve 1 problem?

Diagnosing a Variable Intake Air System Control Solenoid Valve 1 issue involves checking the valve for proper operation, inspecting wiring connections, and using a scan tool to read the OBDII code.

5. Can I drive my 2012 Nissan Altima Sedan with OBDII code P1800?

It is not recommended to drive your 2012 Nissan Altima Sedan with OBDII code P1800, as it can lead to engine performance issues and potential damage if left unresolved.

6. How do I repair a Variable Intake Air System Control Solenoid Valve 1 issue?

Repairing a Variable Intake Air System Control Solenoid Valve 1 problem may involve replacing the faulty solenoid valve, repairing damaged wiring, or resetting the engine control module.

7. Can I reset the OBDII code P1800 on my 2012 Nissan Altima Sedan myself?

You can attempt to reset the OBDII code P1800 on your 2012 Nissan Altima Sedan by using an OBDII scanner to clear the code after addressing the underlying issue.

8. Are there any preventive maintenance tips to avoid OBDII code P1800 on a 2012 Nissan Altima Sedan?

To prevent OBDII code P1800 on your 2012 Nissan Altima Sedan, it's essential to regularly inspect and maintain the Variable Intake Air System components as per the manufacturer's recommendations.

9. How much does it cost to repair OBDII code P1800 on a 2012 Nissan Altima Sedan?

The cost of repairing OBDII code P1800 on a 2012 Nissan Altima Sedan can vary depending on the extent of the issue, parts needed, and labor rates at the repair shop.

10. Can a DIY enthusiast fix OBDII code P1800 on a 2012 Nissan Altima Sedan?

Depending on your skill level and access to tools, a DIY enthusiast may be able to address OBDII code P1800 by following repair guides, but it's recommended to consult with a professional if unsure.