AutoCodes – Mercury – C1866 Mercury

C1866 Mercury Code - Air Suspension Rear Inflator Solenoid Output Circuit Open

Quick Answer

The Vehicle Dynamic Module (VDM) monitors the Air Suspension Rear Inflator Solenoid. Common causes include Faulty Air Suspension Rear Inflator Solenoid, Air Suspension Rear Inflator Solenoid harness is open or shorted, Air Suspension Rear Inflator Solenoid 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
C1866 Mercury indicates Air Suspension Rear Inflator Solenoid Output Circuit Open.
Common causes
Common causes include Faulty Air Suspension Rear Inflator Solenoid, Air Suspension Rear Inflator Solenoid harness is open or shorted, Air Suspension Rear Inflator Solenoid 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 677
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 27, 2020
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Code C1866 Mercury Description

The Vehicle Dynamic Module (VDM) monitors the Air Suspension Rear Inflator Solenoid. The VDM sets the OBDII code when the Air Suspension Rear Inflator Solenoid is not to factory specifications.
OBDII Code C1866 Mercury - Air Suspension Rear Inflator Solenoid Output Circuit Open - AutoCodes.com
C1866 Mercury Code - Air Suspension Rear Inflator Solenoid Output Circuit Open

What are the Possible Causes of the DTC C1866 Mercury?

  • Faulty Air Suspension Rear Inflator Solenoid
  • Air Suspension Rear Inflator Solenoid harness is open or shorted
  • Air Suspension Rear Inflator Solenoid circuit poor electrical connection
  • Faulty Vehicle Dynamic Module (VDM)

How to Fix the DTC C1866 Mercury?

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 C1866 Mercury 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 C1866 Mercury code?

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Need Help with the Code?

Get the C1866 Mercury 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 C1866 Mercury Code

1. What are the common symptoms of OBDII code C1866 on a Mercury related to the Air Suspension Rear Inflator Solenoid Output Circuit Open?

The common symptoms include the rear of the vehicle sitting lower than usual, a rough ride, and the air suspension system not functioning properly.

2. What could cause the OBDII code C1866 on a Mercury indicating an Air Suspension Rear Inflator Solenoid Output Circuit Open?

Possible causes include damaged wiring or connectors in the inflator solenoid circuit, a faulty inflator solenoid, or issues with the air suspension control module.

3. How can I diagnose the OBDII code C1866 on a Mercury for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

Diagnosis involves inspecting the wiring and connectors for damage, testing the resistance of the inflator solenoid, and checking for any faults in the air suspension system using a diagnostic scanner.

4. Is it safe to drive a Mercury with the OBDII code C1866 indicating an Air Suspension Rear Inflator Solenoid Output Circuit Open?

It is not recommended to drive the vehicle with this code active, as it can affect the performance and stability of the air suspension system, potentially compromising the vehicle's handling.

5. Can I repair the OBDII code C1866 on a Mercury related to the Air Suspension Rear Inflator Solenoid Output Circuit Open myself?

Depending on your skill level and access to tools, you may be able to repair this issue yourself by addressing the damaged wiring, replacing the inflator solenoid, or repairing any faults in the air suspension control module.

6. How much does it typically cost to repair the OBDII code C1866 on a Mercury for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

The cost of repair can vary depending on the extent of the damage and the parts needed, but it can range from a few hundred to over a thousand dollars if taken to a professional mechanic.

7. Can resetting the OBDII code C1866 on a Mercury related to the Air Suspension Rear Inflator Solenoid Output Circuit Open fix the issue?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to appear. It's important to diagnose and repair the issue to ensure the proper functioning of the air suspension system.

8. How long does it typically take to repair the OBDII code C1866 on a Mercury for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

The repair time can vary depending on the specific cause of the issue and the complexity of the repair, but it can generally take a few hours to a full day to complete the necessary repairs.

9. Are there any preventive measures to avoid encountering the OBDII code C1866 on a Mercury related to the Air Suspension Rear Inflator Solenoid Output Circuit Open in the future?

Regularly inspecting the air suspension system, ensuring proper maintenance, and addressing any issues promptly can help prevent the recurrence of this OBDII code in the future.

10. Will driving with the OBDII code C1866 on a Mercury for the Air Suspension Rear Inflator Solenoid Output Circuit Open cause further damage to the vehicle?

Continued driving with this code can potentially cause further damage to the air suspension system and other related components, leading to more costly repairs down the line. It is recommended to address the issue promptly.

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