AutoCodes – Mercury – C1851 Mercury

C1851 Mercury Code - Air Suspension Warning Lamp Circuit Open

Quick Answer

The Air Suspension Control Module monitors the Air Suspension Warning Lamp. Common causes include Faulty Air Suspension Warning Lamp, Air Suspension Warning Lamp harness is open or shorted, Air Suspension Warning Lamp circuit poor electrical connection. 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 Mercury indicates Air Suspension Warning Lamp Circuit Open.
Common causes
Common causes include Faulty Air Suspension Warning Lamp, Air Suspension Warning Lamp harness is open or shorted, Air Suspension Warning Lamp circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 663
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 30, 2020
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Code C1851 Mercury Description

The Air Suspension Control Module monitors the Air Suspension Warning Lamp. The Air Suspension Disable Switch sets the OBDII code when the Air Suspension Warning Lamp is not to factory specifications.
OBDII Code C1851 Mercury - Air Suspension Warning Lamp Circuit Open - AutoCodes.com
C1851 Mercury Code - Air Suspension Warning Lamp Circuit Open

What are the Possible Causes of the DTC C1851 Mercury?

  • Faulty Air Suspension Warning Lamp
  • Air Suspension Warning Lamp harness is open or shorted
  • Air Suspension Warning Lamp circuit poor electrical connection
  • Faulty Air Suspension Control Module

How to Fix the DTC C1851 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 C1851 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 C1851 Mercury code?

Need more information on how to fix the C1851 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1851 Mercury code diagnosed by a professional: Find a repair shop in your area

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 Mercury Code

1. What are the common symptoms of OBDII code C1851 Mercury?

The common symptoms of OBDII code C1851 in a Mercury vehicle include the air suspension warning lamp remaining illuminated on the dashboard.

2. What causes the OBDII code C1851 Mercury to trigger?

The OBDII code C1851 in a Mercury is triggered when the control module detects an open circuit in the air suspension warning lamp circuit.

3. How serious is the OBDII code C1851 Mercury?

The OBDII code C1851 may not affect the overall drivability of the vehicle, but it should not be ignored as it indicates an issue with the air suspension warning lamp circuit.

4. Can I continue driving my Mercury with the OBDII code C1851?

It is generally safe to continue driving your Mercury with the OBDII code C1851, but it is recommended to have the issue diagnosed and repaired as soon as possible to avoid potential suspension system problems.

5. How can I diagnose the OBDII code C1851 in my Mercury?

Diagnosing the OBDII code C1851 involves inspecting the wiring and connections in the air suspension warning lamp circuit for any signs of damage or loose connections.

6. What are some repair tips for fixing the OBDII code C1851 in a Mercury?

Repair tips for fixing the OBDII code C1851 include checking and repairing any damaged wiring, replacing faulty components, and ensuring all connections are secure.

7. Is it possible to reset the OBDII code C1851 Mercury without fixing the underlying issue?

While you can clear the OBDII code C1851 with a scanner, it is not recommended to reset the code without addressing the root cause, as the issue may persist and trigger the code again.

8. Can weather or road conditions cause the OBDII code C1851 in a Mercury?

Extreme weather conditions or rough road conditions are not typically the direct cause of the OBDII code C1851. The code is usually triggered by a fault in the air suspension warning lamp circuit.

9. Will fixing the OBDII code C1851 Mercury be expensive?

The cost of repairing the OBDII code C1851 in a Mercury can vary depending on the extent of the issue and the necessary repairs. It is recommended to consult a professional for an accurate estimate.

10. How long does it take to repair the OBDII code C1851 in a Mercury?

The repair time for the OBDII code C1851 in a Mercury can vary based on the specific issue and the expertise of the technician. Simple fixes may take a short time, while more complex problems could require additional diagnosis and repair.

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