AutoCodes – Lincoln – U0403 Lincoln

U0403 Lincoln Code - Invalid Data Received From Transfer Case Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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: U0403 Lincoln indicates Invalid Data Received From Transfer Case Control Module.
Common causes: Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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 665

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 Apr 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0403 Lincoln Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Transfer Case Control Module causing its integrity to be questioned.

OBDII Code U0403 Lincoln - Invalid Data Received From Transfer Case Control Module - AutoCodes.com — U0403 Lincoln Code - Invalid Data Received From Transfer Case Control Module

What does this mean?

What are the Possible Causes of the DTC U0403 Lincoln?

Faulty Transfer Case Control Module
Transfer Case Control Module harness is open or shorted
Transfer Case Control Module circuit poor electrical connection

How to Fix the DTC U0403 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 U0403 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.

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Need more information on how to fix the U0403 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 U0403 Lincoln Code

1. What are common symptoms of OBDII code U0403 in a Lincoln related to the Transfer Case Control Module?

The common symptoms include issues with the 4-wheel drive system, illuminated warning lights on the dashboard, and difficulty shifting between drive modes.

2. What are possible causes of the U0403 code in a Lincoln vehicle?

Possible causes include a faulty transfer case control module, damaged wiring or connectors, software issues, or a malfunction in the transfer case itself.

3. How can I diagnose the U0403 code in my Lincoln?

Diagnosis involves using a diagnostic scanner to retrieve the code, checking for any other related codes, inspecting the transfer case control module and its connections, and performing a visual inspection of the wiring.

4. Can I still drive my Lincoln with the U0403 code present?

It is not recommended to drive your vehicle with the U0403 code present, as it can lead to further damage to the transfer case system. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I repair the U0403 code in my Lincoln?

Repair options include replacing the transfer case control module, repairing any damaged wiring or connectors, updating the software, or addressing any other underlying issues causing the code.

6. Is it possible to reset the U0403 code in a Lincoln without fixing the underlying issue?

While you can clear the code with a diagnostic scanner, it will likely reappear if the underlying issue is not addressed. It's important to fix the root cause of the problem to prevent future occurrences.

7. Can weather conditions affect the occurrence of the U0403 code in a Lincoln?

Extreme weather conditions such as cold temperatures or moisture can sometimes exacerbate issues related to the transfer case control module, leading to the U0403 code being triggered.

8. How long does it typically take to repair the U0403 code in a Lincoln?

The repair time can vary depending on the exact cause of the code and the availability of parts. In some cases, it can be a relatively quick fix, while in others, it may take more time to diagnose and repair the issue.

9. Are there any preventive measures to avoid the U0403 code in a Lincoln?

Regular maintenance of the transfer case system, checking for loose connections or damaged wiring, and addressing any warning signs promptly can help prevent the occurrence of the U0403 code.

10. Is it necessary to visit a dealership for the repair of the U0403 code in a Lincoln, or can it be done by an independent mechanic?

While a dealership may have specialized knowledge and access to specific parts, an independent mechanic with experience in diagnosing and repairing transfer case issues can also effectively address the U0403 code in a Lincoln.