AutoCodes – Ford – C1851 Ford

C1851 Ford Code - Air Suspension Warning Lamp Circuit Open

Quick Answer

The Air Suspension Control Module monitors the Air Suspension Warning Lamp. Common causes include Faulty Air Suspension Warning Lamp, Air Suspension Warning Lamp harness is open or shorted, Air Suspension Warning Lamp 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: C1851 Ford indicates Air Suspension Warning Lamp Circuit Open.
Common causes: Common causes include Faulty Air Suspension Warning Lamp, Air Suspension Warning Lamp harness is open or shorted, Air Suspension Warning Lamp 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 820

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 C1851 Ford Description

The Air Suspension Control Module monitors the Air Suspension Warning Lamp. The Air Suspension Disable Switch sets the OBDII code when the Air Suspension Warning Lamp is not to factory specifications.

OBDII Code C1851 Ford - Air Suspension Warning Lamp Circuit Open - AutoCodes.com — C1851 Ford Code - Air Suspension Warning Lamp Circuit Open

What does this mean?

What are the Possible Causes of the DTC C1851 Ford?

Faulty Air Suspension Warning Lamp
Air Suspension Warning Lamp harness is open or shorted
Air Suspension Warning Lamp circuit poor electrical connection
Faulty Air Suspension Control Module

How to Fix the DTC C1851 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 C1851 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 more information on how to fix the C1851 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1851 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 C1851 Ford Code

1. What are common symptoms of OBDII code C1851 in a Ford related to the Air Suspension Warning Lamp Circuit Open?

- The most common symptoms include the air suspension warning lamp staying illuminated on the dashboard.

2. What could cause the Air Suspension Warning Lamp Circuit Open in a Ford triggering code C1851?

- Potential causes include a faulty wiring connection, a damaged wire in the circuit, or a defective air suspension warning lamp.

3. How can I diagnose the issue causing the Air Suspension Warning Lamp Circuit Open code C1851 in my Ford?

- To diagnose the problem, you can start by visually inspecting the wiring and connections related to the air suspension warning lamp circuit for any visible damage.

4. Can a blown fuse lead to OBDII code C1851 in a Ford due to the Air Suspension Warning Lamp Circuit Open?

- Yes, a blown fuse in the circuit can also cause the Air Suspension Warning Lamp Circuit Open issue, triggering code C1851.

5. Are there any repair tips for fixing OBDII code C1851 related to the Air Suspension Warning Lamp Circuit Open in a Ford?

- Repair tips include checking and repairing any damaged wiring, ensuring proper connections, and replacing any faulty components like the warning lamp if needed.

6. Is it safe to continue driving my Ford with the Air Suspension Warning Lamp Circuit Open issue causing OBDII code C1851?

- It is recommended to address the underlying problem causing the code as soon as possible to prevent any potential issues with the air suspension system.

7. Can resetting the OBDII system clear the C1851 code related to the Air Suspension Warning Lamp Circuit Open in a Ford?

- Resetting the system may temporarily clear the code, but if the root cause of the issue is not fixed, the code is likely to reappear.

8. How can a professional mechanic help in diagnosing and repairing the Air Suspension Warning Lamp Circuit Open issue triggering code C1851 in my Ford?

- A professional mechanic can use specialized diagnostic tools to pinpoint the exact cause of the problem and perform the necessary repairs effectively.

9. Are there any recalls or technical service bulletins related to OBDII code C1851 concerning the Air Suspension Warning Lamp Circuit Open in Ford vehicles?

- It is advisable to check with Ford dealerships or online resources for any recalls or technical service bulletins specific to this code in your particular Ford model.

10. Can extreme weather conditions impact the occurrence of OBDII code C1851 due to the Air Suspension Warning Lamp Circuit Open in a Ford?

- While extreme weather conditions may not directly cause the code, they can potentially worsen existing issues with wiring or components in the air suspension system, leading to the code being triggered.