Engine-CodesFord – C1851 Ford

C1851 Ford Code - Air Suspension Warning Lamp Circuit Open

Quick Answer

The C1851 Ford code indicates that there is an issue with the Air Suspension Warning Lamp Circuit being open. Common causes include Broken or damaged wiring in the air suspension warning lamp circuit, Faulty air suspension warning lamp, Loose or corroded connections in the circuit. 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 Broken or damaged wiring in the air suspension warning lamp circuit, Faulty air suspension warning lamp, Loose or corroded connections in the circuit.
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.
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code C1851 Ford Description

The C1851 Ford code indicates that there is an issue with the Air Suspension Warning Lamp Circuit being open. This means that there is a break or interruption in the circuit that controls the air suspension warning lamp in the vehicle. The air suspension warning lamp is a crucial component of the vehicle's air suspension system, which helps to maintain a smooth and comfortable ride by adjusting the vehicle's ride height and stiffness based on driving conditions.

OBDII Code C1851 Ford - Air Suspension Warning Lamp Circuit Open
C1851 Ford Code - Air Suspension Warning Lamp Circuit Open

Common Causes of C1851 Ford

  1. Broken or damaged wiring in the air suspension warning lamp circuit.
  2. Faulty air suspension warning lamp.
  3. Loose or corroded connections in the circuit.
  4. Issues with the air suspension control module.
  5. Electrical issues within the vehicle's wiring system.

Symptoms of C1851 Ford

  1. Air suspension warning lamp not illuminating when there is an issue with the air suspension system.
  2. Inconsistent or intermittent illumination of the air suspension warning lamp.
  3. Vehicle ride quality may feel rough or uneven.
  4. Air suspension system may fail to adjust properly based on driving conditions.
  5. Dashboard warning message related to air suspension system may appear.

How to Fix C1851 Ford

  1. Begin by inspecting the wiring and connections in the air suspension warning lamp circuit for any breaks or damage. Repair or replace any faulty wiring or connections.
  2. Test the air suspension warning lamp to ensure it is functioning properly. Replace the lamp if necessary.
  3. Check the air suspension control module for any faults or errors. Reset or replace the module as needed.
  4. Clear the diagnostic trouble codes from the vehicle's system using a diagnostic scanner.
  5. Test drive the vehicle to ensure that the air suspension warning lamp functions correctly and that the air suspension system adjusts properly.

Cost to Fix C1851 Ford

The typical repair costs for addressing the C1851 Ford code related to the Air Suspension Warning Lamp Circuit Open can vary depending on the specific cause of the issue. In general, the cost of parts for this repair could range from $50 to $200, while labor costs could range from $100 to $300. Overall, the total cost for this repair could be anywhere from $150 to $500. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop. It is advisable to consult with a professional mechanic to get a more accurate cost estimate for this repair.

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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.

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