AutoCodes – Mercury – U0556 Mercury

U0556 Mercury Code - Invalid Data Received From Front Display Interface 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 Front Display Interface Module, Front Display Interface Module harness is open or shorted, Front Display Interface 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: U0556 Mercury indicates Invalid Data Received From Front Display Interface Module.
Common causes: Common causes include Faulty Front Display Interface Module, Front Display Interface Module harness is open or shorted, Front Display Interface 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 427

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0556 Mercury 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 Front Display Interface Module causing its integrity to be questioned.

OBDII Code U0556 Mercury - Invalid Data Received From Front Display Interface Module - AutoCodes.com — U0556 Mercury Code - Invalid Data Received From Front Display Interface Module

What does this mean?

What are the Possible Causes of the DTC U0556 Mercury?

Faulty Front Display Interface Module
Front Display Interface Module harness is open or shorted
Front Display Interface Module circuit poor electrical connection

How to Fix the DTC U0556 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 U0556 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.

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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 U0556 Mercury Code

1. What are the common symptoms of OBDII code U0556 in a Mercury vehicle?

- Common symptoms include malfunctioning front display interface module, loss of communication with the module, and dashboard warning lights.

2. What can cause the OBDII code U0556 to appear in a Mercury?

- The code U0556 often indicates invalid data received from the front display interface module due to wiring issues, a faulty module, or a communication network problem.

3. How can I diagnose the OBDII code U0556 in my Mercury?

- You can diagnose the code U0556 by checking the front display interface module for any visible damage, inspecting the wiring harness for loose connections or breaks, and using a scan tool to retrieve specific error codes.

4. Is it safe to drive my Mercury with the OBDII code U0556 present?

- It is not recommended to drive your Mercury with the code U0556 as it can lead to issues with the front display interface module, affecting important vehicle information display and potentially causing safety concerns.

5. Can I repair the OBDII code U0556 in my Mercury myself?

- While some DIY enthusiasts may attempt to repair the code U0556 by checking and fixing wiring connections, it is often recommended to seek professional help to diagnose and repair the underlying cause properly.

6. How much does it cost to fix the OBDII code U0556 in a Mercury?

- The cost to fix the code U0556 can vary depending on the root cause of the issue, but it may involve replacing the front display interface module, repairing wiring, or addressing communication network problems, potentially ranging from a few hundred to a thousand dollars.

7. Can a faulty battery trigger the OBDII code U0556 in a Mercury?

- Yes, a faulty battery or low battery voltage can sometimes lead to communication issues with the front display interface module, triggering the OBDII code U0556 in a Mercury.

8. Will resetting the error codes clear the OBDII code U0556 in my Mercury?

- Resetting the error codes may temporarily clear the OBDII code U0556, but if the underlying issue persists, the code is likely to reappear after driving the vehicle for some time.

9. Are there any preventive measures to avoid the OBDII code U0556 in my Mercury?

- Regularly checking the front display interface module, ensuring proper wiring connections, and maintaining the vehicle's electrical system can help prevent the occurrence of the OBDII code U0556 in your Mercury.

10. Can extreme weather conditions affect the appearance of the OBDII code U0556 in a Mercury?

- Extreme weather conditions, such as excessive heat or cold, can sometimes impact the front display interface module's functionality and lead to communication problems, potentially triggering the OBDII code U0556 in a Mercury.