AutoCodes – Mercury – U0405 Mercury

U0405 Mercury Code - Invalid Data Received From Cruise 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 Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise 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: U0405 Mercury indicates Invalid Data Received From Cruise Control Module.
Common causes: Common causes include Faulty Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise 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 479

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 U0405 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 Cruise Control Module causing its integrity to be questioned.

OBDII Code U0405 Mercury - Invalid Data Received From Cruise Control Module - AutoCodes.com — U0405 Mercury Code - Invalid Data Received From Cruise Control Module

What does this mean?

What are the Possible Causes of the DTC U0405 Mercury?

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

How to Fix the DTC U0405 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 U0405 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 U0405 Mercury Code

1. What are common symptoms of OBDII code U0405 in a Mercury related to the Cruise Control Module?

Symptoms may include inoperative cruise control, illuminated warning lights on the dashboard, and potential issues with vehicle speed control.

2. What are some possible causes of the U0405 code in a Mercury indicating Invalid Data Received From Cruise Control Module?

Potential causes include faulty cruise control module, damaged wiring or connectors, software issues, or communication network problems within the vehicle.

3. How can I diagnose the U0405 code in my Mercury related to the Cruise Control Module?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, checking the cruise control module for any visible damage, and inspecting the wiring and connectors for any issues.

4. Can I still drive my Mercury with the U0405 code indicating Invalid Data Received From Cruise Control Module?

It is generally safe to drive the vehicle with this code, but it is advisable to address the issue promptly to ensure proper functioning of the cruise control system.

5. How can I repair the U0405 code in my Mercury associated with the Cruise Control Module?

Repair options may include replacing the cruise control module, repairing damaged wiring or connectors, updating software if necessary, and resetting the error code using a diagnostic tool.

6. Are there any DIY tips for fixing the U0405 code in a Mercury due to issues with the Cruise Control Module?

While basic checks like inspecting wiring connections can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair of the cruise control module.

7. Can a faulty speed sensor cause the U0405 code to appear in a Mercury's OBDII system?

Yes, a malfunctioning speed sensor can potentially trigger the U0405 code by disrupting communication between the cruise control module and other vehicle systems.

8. Is it common for the U0405 code related to the Cruise Control Module to reoccur after repair in a Mercury?

If the root cause of the issue is not adequately addressed during repair, the U0405 code may reappear. Thorough diagnosis and proper repair are essential to prevent recurrence.

9. Can extreme weather conditions contribute to the occurrence of the U0405 code in a Mercury?

Extreme temperatures or moisture can sometimes affect the electronic components of the cruise control module, potentially leading to the U0405 code being triggered.

10. Will resetting the error codes on my Mercury clear the U0405 code related to the Cruise Control Module?

While resetting the error codes may temporarily clear the U0405 code, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.