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Engine-Codes – Mercury – C1918 Mercury

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

Quick Answer

The C1918 diagnostic trouble code for Mercury vehicles indicates a failure in the air suspension ride height select switch circuit. Common causes include Faulty ride height select switch, Wiring issues or loose connections in the circuit, Blown fuse related to the air suspension system. 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 Mercury indicates Air Suspension Ride Height Select Switch Circuit Failure.
Common causes
Common causes include Faulty ride height select switch, Wiring issues or loose connections in the circuit, Blown fuse related to the air suspension system.
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 11, 2024
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Code C1918 Mercury Description

The C1918 diagnostic trouble code for Mercury vehicles indicates a failure in the air suspension ride height select switch circuit. This system is responsible for controlling the ride height of the vehicle, allowing it to adjust based on driving conditions and passenger weight. When this circuit fails, it can lead to issues with the vehicle's suspension system, affecting ride comfort, handling, and overall performance.

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

Common Causes of C1918 Mercury

  1. Faulty ride height select switch
  2. Wiring issues or loose connections in the circuit
  3. Blown fuse related to the air suspension system
  4. Malfunctioning air suspension components
  5. Water or corrosion damage to the circuit

Symptoms of C1918 Mercury

  1. Warning lights on the dashboard related to the suspension system
  2. Noticeable difference in ride height
  3. Stiffer or bouncier ride than usual
  4. Reduced stability and control while driving

How to Fix C1918 Mercury

  1. Diagnose the issue by checking the ride height select switch, wiring, and related components for faults.
  2. Repair or replace any damaged wiring or connections in the circuit.
  3. Test the functionality of the ride height select switch and replace if necessary.
  4. Inspect and potentially replace any malfunctioning air suspension components.
  5. Reset the system and test the ride height adjustment to ensure proper functionality.

Cost to Fix C1918 Mercury

The typical repair costs for addressing the C1918 code related to air suspension ride height select switch circuit failure can vary depending on the specific issues identified during diagnosis. On average, the parts and labor for this repair could range from $200 to $500. However, it's important to note that labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as location, vehicle make and model, and engine type can also impact the overall cost. For a more accurate estimate, it's advisable to consult local auto repair shops for pricing details.

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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 Mercury Code

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

The common symptoms include the air suspension system not responding to ride height adjustments, the ride height select switch not working, and the vehicle sitting too high or too low.

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

Possible causes include a faulty ride height select switch, wiring issues in the circuit, a malfunctioning suspension control module, or a blown fuse related to the air suspension system.

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

Diagnosing this code involves checking the ride height select switch for proper operation, inspecting the wiring and connectors for any damage, testing the suspension control module, and scanning for additional fault codes in the system.

4. Can I still drive my Mercury with OBDII code C1918 related to Air Suspension Ride Height Select Switch Circuit Failure?

It is not recommended to drive the vehicle with this code active, as it can affect the performance and safety of the air suspension system. It's best to address the issue promptly.

5. How can I repair OBDII code C1918 in a Mercury related to Air Suspension Ride Height Select Switch Circuit Failure?

Repairing this code may involve replacing the faulty ride height select switch, repairing any damaged wiring or connectors, resetting the suspension control module, and clearing the fault code from the system.

6. Is it possible to reset the OBDII code C1918 in a Mercury related to Air Suspension Ride Height Select Switch Circuit Failure without repairs?

While clearing the fault code may temporarily turn off the warning light, it is important to address the underlying issue causing the code to prevent further problems with the air suspension system.

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

Depending on the skill level and tools available, a DIY enthusiast may be able to diagnose and repair simple causes of this code, such as replacing the ride height select switch or checking for loose connections.

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

The cost of repair can vary depending on the specific cause of the issue. Simple repairs like replacing a switch may cost less, while more complex problems involving the suspension control module can be more expensive.

9. Are there any preventive maintenance tips to avoid OBDII code C1918 in a Mercury related to Air Suspension Ride Height Select Switch Circuit Failure?

Regularly inspecting the air suspension system, checking the ride height select switch for proper operation, and addressing any issues promptly can help prevent this code from occurring.

10. Will OBDII code C1918 in a Mercury related to Air Suspension Ride Height Select Switch Circuit Failure affect the overall performance of the vehicle?

While this code primarily relates to the air suspension system, ignoring the issue can lead to uneven ride height, poor handling, and potential safety concerns. It is important to address the problem to maintain the vehicle's performance.

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