AutoCodes – Nissan – C1804 Nissan

C1804 Nissan Code - Air Suspension Vehicle Height Adjustment Up

Quick Answer

The Air Levelizer Control Module monitors the Vehicle Height Sensor. Common causes include Faulty Vehicle Height Sensor, Vehicle Height Sensor harness is open or shorted, Vehicle Height Sensor 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: C1804 Nissan indicates Air Suspension Vehicle Height Adjustment Up.
Common causes: Common causes include Faulty Vehicle Height Sensor, Vehicle Height Sensor harness is open or shorted, Vehicle Height Sensor 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 11,948

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1804 Nissan Description

The Air Levelizer Control Module monitors the Vehicle Height Sensor. The Air Levelizer Control Module sets the OBDII code when the Vehicle Height Sensor is not to factory specifications.

OBDII Code C1804 Nissan - Air Suspension Vehicle Height Adjustment Up - AutoCodes.com — C1804 Nissan Code - Air Suspension Vehicle Height Adjustment Up

What does this mean?

What are the Possible Causes of the DTC C1804 Nissan?

Faulty Vehicle Height Sensor
Vehicle Height Sensor harness is open or shorted
Vehicle Height Sensor circuit poor electrical connection
Faulty Air Levelizer Control Module

How to Fix the DTC C1804 Nissan?

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 C1804 Nissan 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 C1804 Nissan code?

Need more information on how to fix the C1804 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1804 Nissan 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 C1804 Nissan Code

1. What are the common symptoms of OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

The common symptoms include the vehicle sitting higher than usual, uneven ride height among different wheels, and potential issues with the air suspension system.

2. What are the possible causes of OBDII code C1804 in a Nissan triggering the air suspension vehicle height adjustment up?

The code C1804 may be caused by a faulty height sensor, a malfunctioning air compressor, a leak in the air suspension system, or a problem with the control module.

3. How can I diagnose the OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

Diagnosis involves checking the height sensors, inspecting the air suspension components for leaks, testing the air compressor, and scanning the control module for error codes.

4. Can driving with the OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up cause further damage?

Continuing to drive with this code may lead to uneven tire wear, compromised handling, and potential damage to other suspension components over time.

5. What are some basic repair tips for fixing OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

Start by checking and adjusting the ride height, inspecting for any visible leaks in the air suspension system, testing the height sensors, and ensuring proper functionality of the air compressor.

6. Is it safe to continue driving my Nissan with the air suspension vehicle height adjustment up due to OBDII code C1804?

It is generally not recommended to drive the vehicle with the suspension system malfunctioning, as it can affect the vehicle's stability, handling, and overall safety.

7. How much can I expect to pay to repair OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset the OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up without repairing the issue?

While you can clear the error code temporarily, it is crucial to address the underlying problem causing the code to prevent further issues with the air suspension system.

9. Are there any preventative maintenance steps to avoid OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

Regularly inspecting the air suspension system, checking the ride height, and addressing any leaks or sensor issues promptly can help prevent the occurrence of this code.

10. How long does it typically take to repair OBDII code C1804 in a Nissan related to air suspension vehicle height adjustment up?

The repair time can vary based on the specific cause of the issue and the complexity of the repair needed, but it may take anywhere from a few hours to a full day at a repair shop.