AutoCodes – Ford – U1A4C Ford

U1A4C Ford Code - Build/End Of Line Mode Active

Quick Answer

This Diagnostic Trouble Code (DTC) can be set in the Driver Front Seat Module (DSM) if the seat calibration routine has not been completed successfully. Common causes include Seat calibration routine did not complete successfully, Faulty Driver Front Seat Module (DSM), Driver Front Seat Module harness is open or shorted. 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: U1A4C Ford indicates Build/End Of Line Mode Active.
Common causes: Common causes include Seat calibration routine did not complete successfully, Faulty Driver Front Seat Module (DSM), Driver Front Seat Module harness is open or shorted.
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 3,851

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 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1A4C Ford Description

This Diagnostic Trouble Code (DTC) can be set in the Driver Front Seat Module (DSM) if the seat calibration routine has not been completed successfully.

OBDII Code U1A4C Ford - Build/End Of Line Mode Active - AutoCodes.com — U1A4C Ford Code - Build/End Of Line Mode Active

What does this mean?

What are the Possible Causes of the DTC U1A4C Ford?

Seat calibration routine did not complete successfully
Faulty Driver Front Seat Module (DSM)
Driver Front Seat Module harness is open or shorted
Driver Front Seat Module circuit poor electrical connection

How to Fix the DTC U1A4C Ford?

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 U1A4C Ford 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 U1A4C Ford code?

Need more information on how to fix the U1A4C Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1A4C Ford 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 U1A4C Ford Code

1. What does the OBDII code U1A4C Ford mean?

The code U1A4C Ford indicates that the Build/End Of Line Mode is active in the vehicle's system.

2. What are the common symptoms of U1A4C Ford code?

Common symptoms of the U1A4C Ford code may include issues with the vehicle's performance, such as reduced engine power, rough idling, or difficulty shifting gears.

3. What causes the U1A4C Ford code to trigger?

The U1A4C Ford code is typically triggered when there is a communication issue between the different modules in the vehicle's network, or when there is a fault in the Build/End Of Line Mode system.

4. How do I diagnose the U1A4C Ford code?

Diagnosing the U1A4C Ford code usually involves using a diagnostic scan tool to retrieve the specific fault codes and data related to the Build/End Of Line Mode system.

5. Can I continue driving with the U1A4C Ford code active?

It is not recommended to continue driving with the U1A4C Ford code active, as it may lead to further damage to the vehicle or potentially unsafe driving conditions.

6. How can I repair the U1A4C Ford code?

Repairing the U1A4C Ford code typically involves addressing the underlying cause of the issue, which may include checking and repairing wiring connections, replacing faulty modules, or reprogramming the vehicle's software.

7. Are there any DIY tips to fix the U1A4C Ford code?

DIY tips for fixing the U1A4C Ford code may include checking for loose or damaged wiring connections, ensuring all modules are properly connected, and resetting the system by disconnecting the battery for a few minutes.

8. Is the U1A4C Ford code a common issue in Ford vehicles?

The U1A4C Ford code is not as common as some other OBDII codes, but it can still occur in Ford vehicles, especially in newer models with advanced electronic systems.

9. Can the U1A4C Ford code be cleared/reset without repairs?

While you can clear the U1A4C Ford code with a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

10. How much does it cost to repair the U1A4C Ford code at a dealership or mechanic?

The cost of repairing the U1A4C Ford code can vary depending on the underlying issue, the labor rates of the dealership or mechanic, and the parts that need to be replaced. It is recommended to get a diagnostic assessment to determine the exact cost.