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Engine-Codes – Lincoln – C1918 Lincoln

C1918 Lincoln Code - Air Suspension Ride Height Select Switch Circuit Failure

Quick Answer

The C1918 diagnostic trouble code for Lincoln vehicles specifically relates to an issue with the Air Suspension Ride Height Select Switch Circuit. Common causes include Faulty ride height select switch, Wiring issues in the circuit, Loose or corroded electrical connections. 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
C1918 Lincoln indicates Air Suspension Ride Height Select Switch Circuit Failure.
Common causes
Common causes include Faulty ride height select switch, Wiring issues in the circuit, Loose or corroded electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code C1918 Lincoln Description

The C1918 diagnostic trouble code for Lincoln vehicles specifically relates to an issue with the Air Suspension Ride Height Select Switch Circuit. This code indicates a failure within the circuit that controls the ride height select switch in the vehicle's air suspension system. The air suspension system is responsible for maintaining a smooth and comfortable ride by adjusting the vehicle's ride height based on driving conditions and load. The ride height select switch allows the driver to manually adjust the suspension settings to suit their preferences or specific driving conditions.

OBDII Code C1918 Lincoln - Air Suspension Ride Height Select Switch Circuit Failure
C1918 Lincoln Code - Air Suspension Ride Height Select Switch Circuit Failure

Common Causes of C1918 Lincoln

  1. Faulty ride height select switch
  2. Wiring issues in the circuit
  3. Loose or corroded electrical connections
  4. Defective air suspension control module
  5. Malfunctioning air suspension compressor

Symptoms of C1918 Lincoln

  1. Erratic or incorrect ride height adjustments
  2. Harsh ride quality
  3. Poor handling
  4. Uneven tire wear
  5. Suspension failure to adjust properly

How to Fix C1918 Lincoln

  1. Begin by conducting a thorough inspection of the ride height select switch, wiring, and electrical connections for any visible damage or corrosion.
  2. Test the switch and circuit using a multimeter to check for continuity and proper voltage levels.
  3. Replace the ride height select switch if it is found to be faulty.
  4. Repair or replace any damaged wiring or connectors in the circuit.
  5. If the issue persists, diagnose and address any problems with the air suspension control module or compressor.

Cost to Fix C1918 Lincoln

The typical repair costs for addressing a C1918 code related to the Air Suspension Ride Height Select Switch Circuit Failure can range from $200 to $500, including parts and labor. However, it's important to note that actual costs can vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing. It is advisable to obtain quotes from local repair facilities for a more accurate estimate.

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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 C1918 Lincoln Code

1. What are the common symptoms of OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- Common symptoms include the inability to adjust the ride height of the air suspension system, a malfunctioning ride height select switch, and the suspension remaining at a fixed height.

2. What are some possible causes of OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- Potential causes may include a faulty ride height select switch, damaged wiring or connectors in the circuit, issues with the air suspension control module, or a malfunctioning ride height sensor.

3. How can I diagnose OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- Diagnosis typically involves checking the condition of the ride height select switch, inspecting the wiring and connectors for any damage, testing the functionality of the air suspension control module, and verifying the proper operation of the ride height sensor.

4. Is it safe to drive a Lincoln with OBDII code C1918 related to the Air Suspension Ride Height Select Switch Circuit Failure?

- It is generally not recommended to drive the vehicle extensively with this code present, as it may affect the performance and safety of the air suspension system. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- Repair tips may include replacing the faulty ride height select switch, repairing or replacing damaged wiring or connectors, resetting the air suspension control module, or recalibrating the ride height sensor.

6. Can resetting the air suspension system resolve OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- In some cases, performing a reset of the air suspension system may help clear the code temporarily. However, if the underlying issue is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- The cost of repair can vary depending on the specific cause of the issue. It may range from a few hundred dollars for basic repairs like switch replacement to over a thousand dollars for more complex issues involving the control module or sensors.

8. Can a DIY enthusiast fix OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure?

- Some basic repairs, such as replacing the ride height select switch or checking for loose connections, can be attempted by DIY enthusiasts with the necessary tools and knowledge. However, more complex issues may require professional expertise.

9. Will OBDII code C1918 in a Lincoln related to the Air Suspension Ride Height Select Switch Circuit Failure cause the air suspension system to fail completely?

- While the code may not necessarily cause a complete failure of the air suspension system, it can impact its functionality and lead to issues with ride comfort, handling, and overall performance. It is important to address the problem to prevent further damage.

10. How often does OBDII code C1918 related to the Air Suspension Ride Height Select Switch Circuit Failure occur in Lincolns?

- This specific OBDII code is relatively rare but can occur in older Lincoln models with air suspension systems. Regular maintenance and inspections can help prevent such issues from arising.

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