Engine-CodesMercury – C1726 Mercury

C1726 Mercury Code - Air Suspension Rear Pneumatic Failure

Quick Answer

The C1726 diagnostic trouble code (DTC) for Mercury vehicles indicates an issue with the rear pneumatic system of the air suspension. Common causes include Worn-out or damaged air springs, Leaking air lines or fittings, Faulty valves in the pneumatic 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
C1726 Mercury indicates Air Suspension Rear Pneumatic Failure.
Common causes
Common causes include Worn-out or damaged air springs, Leaking air lines or fittings, Faulty valves in the pneumatic 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.
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code C1726 Mercury Description

The C1726 diagnostic trouble code (DTC) for Mercury vehicles indicates an issue with the rear pneumatic system of the air suspension. The air suspension system is responsible for providing a smooth and comfortable ride by adjusting the vehicle's ride height and stiffness based on driving conditions. In the case of a rear pneumatic failure, the system may not be able to properly adjust the rear suspension, leading to a variety of performance and safety issues.

OBDII Code C1726 Mercury - Air Suspension Rear Pneumatic Failure
C1726 Mercury Code - Air Suspension Rear Pneumatic Failure

Common Causes of C1726 Mercury

  1. Worn-out or damaged air springs
  2. Leaking air lines or fittings
  3. Faulty valves in the pneumatic system
  4. Malfunctioning compressor
  5. Electrical issues with the air suspension control module

Symptoms of C1726 Mercury

  1. Harsh and bumpy ride, especially in the rear of the vehicle
  2. Rear end of the vehicle sitting lower than normal
  3. Loss of handling and stability, especially during cornering or braking
  4. Unusual noises coming from the rear suspension, such as hissing or whining
  5. Dashboard warning light indicating an issue with the air suspension system

How to Fix C1726 Mercury

  1. Diagnose the specific cause of the rear pneumatic failure using a scan tool to retrieve the DTC and inspecting the air suspension components for leaks or damage.
  2. Replace any worn-out or damaged air springs, air lines, valves, or other components contributing to the issue.
  3. Test the air suspension system to ensure proper function and adjust the ride height as needed.
  4. Clear the DTC from the vehicle's computer system using the scan tool to reset the air suspension system.
  5. Perform a road test to verify that the rear pneumatic failure has been resolved and that the vehicle's ride quality and handling have been restored.

Cost to Fix C1726 Mercury

The typical repair costs for addressing a rear pneumatic failure in the air suspension system of a Mercury vehicle can range from $500 to $1500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops commonly charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may charge less. It's recommended to check local rates for a more accurate estimate of the repair costs for this issue.

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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 C1726 Mercury Code

1. What are the common symptoms of OBDII code C1726 Mercury (Air Suspension Rear Pneumatic Failure)?

- Common symptoms include a noticeable difference in the vehicle's ride height, a sagging rear end, and a bumpy or uneven ride.

2. What are the possible causes of OBDII code C1726 Mercury?

- The code C1726 can be triggered by issues such as a faulty air suspension compressor, leaking air suspension bags, damaged air lines, or a problem with the pneumatic components.

3. How can I diagnose the OBDII code C1726 Mercury issue?

- To diagnose the problem, it is recommended to perform a visual inspection of the air suspension components, check for leaks, test the compressor operation, and use an OBDII scanner to retrieve the fault codes.

4. What are the repair options for fixing OBDII code C1726 Mercury?

- Repair options may include replacing the faulty air suspension components, repairing air leaks, recalibrating the system, or resetting the fault code with a diagnostic tool after resolving the underlying issue.

5. Can I drive my vehicle with OBDII code C1726 Mercury present?

- It is not advisable to drive the vehicle with the C1726 code active, as it can lead to further damage to the air suspension system and affect the vehicle's handling and ride quality.

6. How much does it typically cost to repair OBDII code C1726 Mercury?

- The cost of repairing the C1726 code can vary depending on the specific issue, parts needed, and labor costs. It is recommended to get a diagnostic assessment from a qualified mechanic for an accurate estimate.

7. Are there any DIY tips for resolving OBDII code C1726 Mercury?

- While some basic inspections and maintenance tasks can be done at home, diagnosing and repairing the C1726 code may require specialized tools and expertise. It is best to consult a professional mechanic for proper diagnosis and repair.

8. Can weather conditions affect the triggering of OBDII code C1726 Mercury?

- Extreme weather conditions, such as temperature fluctuations or harsh driving conditions, can potentially exacerbate existing issues with the air suspension system, leading to the activation of the C1726 fault code.

9. How long does it typically take to repair OBDII code C1726 Mercury?

- The repair time for the C1726 code will depend on the specific problem identified during diagnosis, availability of parts, and the mechanic's workload. It is recommended to inquire about the estimated repair time before proceeding with the fix.

10. Will resetting the OBDII code C1726 Mercury make the issue go away permanently?

- Resetting the fault code may temporarily clear the warning light, but if the underlying issue causing the C1726 code is not addressed, the problem is likely to recur. It is essential to diagnose and fix the root cause of the fault for a permanent solution.

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