AutoCodes – Lincoln – C1878 Lincoln

C1878 Lincoln Code - Air Suspension Left Front Air Spring Solenoid Output Circuit Open

Quick Answer

The Vehicle Dynamic Module (VDM) will command the air spring solenoid(s) ON or OFF when certain conditions are met. Common causes include Faulty Air Suspension Left Front Air Spring/Shock Solenoid, Air Suspension Left Front Air Spring/Shock Solenoid harness is open or shorted, Air Suspension Left Front Air Spring/Shock Solenoid 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: C1878 Lincoln indicates Air Suspension Left Front Air Spring Solenoid Output Circuit Open.
Common causes: Common causes include Faulty Air Suspension Left Front Air Spring/Shock Solenoid, Air Suspension Left Front Air Spring/Shock Solenoid harness is open or shorted, Air Suspension Left Front Air Spring/Shock Solenoid 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.

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Code Popularity 768

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 Dec 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1878 Lincoln Description

The Vehicle Dynamic Module (VDM) will command the air spring solenoid(s) ON or OFF when certain conditions are met. The VDM monitors the Air Suspension Left Front Air Spring/Shock Solenoid. The VDM sets the OBDII code when the Air Suspension Left Front Air Spring/Shock Solenoid is not to factory specifications.

OBDII Code C1878 Lincoln - Air Suspension Left Front Air Spring Solenoid Output Circuit Open - AutoCodes.com — C1878 Lincoln Code - Air Suspension Left Front Air Spring Solenoid Output Circuit Open

What does this mean?

What are the Possible Causes of the DTC C1878 Lincoln?

Faulty Air Suspension Left Front Air Spring/Shock Solenoid
Air Suspension Left Front Air Spring/Shock Solenoid harness is open or shorted
Air Suspension Left Front Air Spring/Shock Solenoid circuit poor electrical connection
Faulty Vehicle Dynamic Module (VDM)

How to Fix the DTC C1878 Lincoln?

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 C1878 Lincoln 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 C1878 Lincoln code?

Need more information on how to fix the C1878 Lincoln code? Get Access to Factory Service Manuals

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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 C1878 Lincoln Code

What does the OBDII code C1878 indicate for my Lincoln vehicle?

The code C1878 indicates an open circuit in the left front air spring solenoid output, which affects the air suspension system's ability to adjust properly.

What symptoms might I experience if my vehicle has code C1878?

Symptoms may include a warning light on the dashboard, a rough ride, uneven vehicle height, or the air suspension failing to raise or lower as intended.

What could cause the C1878 code to appear?

Common causes include a faulty left front air spring solenoid, damaged wiring or connectors, or issues with the air suspension control module.

How can I diagnose the issue related to the C1878 code?

Start by inspecting the wiring and connectors for damage, then test the air spring solenoid with a multimeter to check for continuity and proper operation.

What are some common repair solutions for the C1878 code?

Repairs may involve replacing the left front air spring solenoid, repairing damaged wiring, or replacing the air suspension control module if it is found to be faulty.

Can I drive my Lincoln with the C1878 code?

While you can drive the vehicle, it is not recommended as the air suspension system may not function correctly, potentially leading to further suspension damage or handling issues.

How much does it typically cost to repair the C1878 code?

Repair costs can vary widely depending on the issue, but expect to pay anywhere from $100 to $500 for parts and labor, especially if the solenoid needs replacing.

Is it safe to ignore the C1878 code?

Ignoring the code is not safe, as it can lead to further suspension problems and affect vehicle handling and safety.

Can I clear the C1878 code after making repairs?

Yes, you can clear the code using an OBDII scanner after completing the repairs. However, ensure the issue is resolved to prevent the code from reappearing.