AutoCodes – Mercury – C1726 Mercury

C1726 Mercury Code - Air Suspension Rear Pneumatic Failure

Quick Answer

The Vehicle Dynamic Module (VDM) will command the air compressor and air solenoid valves to either fill or vent the air springs depending on the input from the 3 height sensors. Common causes include Air leak(s), Air line blockage(s), Air line(s). 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 Air leak(s), Air line blockage(s), Air line(s).
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 1,643

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1726 Mercury Description

The Vehicle Dynamic Module (VDM) will command the air compressor and air solenoid valves to either fill or vent the air springs depending on the input from the 3 height sensors. The air compressor sends the air to the air springs first through the drier, then along the air lines, passing through several T-fittings and connections, through the air solenoid valves and finally to the air springs.

OBDII Code C1726 Mercury - Air Suspension Rear Pneumatic Failure - AutoCodes.com — C1726 Mercury Code - Air Suspension Rear Pneumatic Failure

What does this mean?

What are the Possible Causes of the DTC C1726 Mercury?

Air leak(s)
Air line blockage(s)
Air line(s)
Mounting bracket(s)
Air compressor drier
Air spring solenoid valve(s)
Height sensor(s)
Air compressor
Faulty Vehicle Dynamic Module (VDM)
Air spring(s)

How to Fix the DTC C1726 Mercury?

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 C1726 Mercury 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.

Need more information about the C1726 Mercury code?

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Need Help with the Code?

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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.