AutoCodes – Ford – C1866 Ford

C1866 Ford 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 Ford 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 1,026
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 Ford 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 Ford - Air Suspension Rear Inflator Solenoid Output Circuit Open - AutoCodes.com
C1866 Ford Code - Air Suspension Rear Inflator Solenoid Output Circuit Open

What are the Possible Causes of the DTC C1866 Ford?

  • 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 Ford?

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 Ford 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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Need Help with the Code?

Get the C1866 Ford 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 Ford Code

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

The common symptoms include a noticeable drop in rear suspension height, uneven ride height between the front and rear of the vehicle, and a "Suspension Fault" warning message on the dashboard.

2. What can cause the OBDII code C1866 Ford indicating an Air Suspension Rear Inflator Solenoid Output Circuit Open?

The code can be triggered by a faulty rear inflator solenoid, damaged wiring or connectors in the circuit, a blown fuse, or a malfunctioning air suspension control module.

3. How can I diagnose the issue related to OBDII code C1866 Ford for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

Diagnosis typically involves visually inspecting the wiring and connectors, testing the rear inflator solenoid for proper operation, checking the fuse related to the circuit, and using a scan tool to retrieve specific fault codes.

4. What are some repair tips for resolving OBDII code C1866 Ford for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

Repair tips may include repairing or replacing damaged wiring and connectors, replacing the rear inflator solenoid if faulty, ensuring the fuse is intact, and resetting the system after repairs are completed.

5. Is it safe to continue driving with OBDII code C1866 Ford 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 lead to further damage to the air suspension system and affect the vehicle's handling and stability.

6. Can resetting the OBDII code C1866 Ford for the Air Suspension Rear Inflator Solenoid Output Circuit Open fix the issue?

Resetting the code may temporarily clear the warning message, but it will not resolve the underlying problem causing the circuit open issue. Proper diagnosis and repair are necessary to address the root cause.

7. How much does it typically cost to repair OBDII code C1866 Ford related to the Air Suspension Rear Inflator Solenoid Output Circuit Open?

The cost of repair can vary depending on the cause of the issue, the parts needed for replacement, and labor costs. It is recommended to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast with automotive knowledge fix OBDII code C1866 Ford for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

Depending on the DIY enthusiast's level of experience and access to tools, repairing this issue may be possible. However, dealing with air suspension components can be complex, so caution and proper safety measures are advised.

9. How long does it take to repair OBDII code C1866 Ford associated with the Air Suspension Rear Inflator Solenoid Output Circuit Open?

The repair time can vary based on the extent of the issue and the specific repairs needed. It can range from a few hours to a full day, especially if diagnostics are required to pinpoint the exact cause of the fault.

10. Can extreme weather conditions or off-road driving cause OBDII code C1866 Ford for the Air Suspension Rear Inflator Solenoid Output Circuit Open?

Yes, extreme weather conditions, such as excessive heat or moisture, and rough off-road driving can potentially lead to damage in the air suspension system components, including the rear inflator solenoid circuit, triggering the fault code. Regular maintenance and inspections can help prevent such issues.

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