AutoCodes – GMC – U0447 GMC

U0447 GMC Code - Invalid Data Received From Central Gateway 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 Central Gateway Control Module, Central Gateway Control Module harness is open or shorted, Central Gateway 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: U0447 GMC indicates Invalid Data Received From Central Gateway Control Module.
Common causes: Common causes include Faulty Central Gateway Control Module, Central Gateway Control Module harness is open or shorted, Central Gateway 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 2,520

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0447 GMC 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 Central Gateway Control Module causing its integrity to be questioned.

OBDII Code U0447 GMC - Invalid Data Received From Central Gateway Control Module - AutoCodes.com — U0447 GMC Code - Invalid Data Received From Central Gateway Control Module

What does this mean?

What are the Possible Causes of the DTC U0447 GMC?

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

How to Fix the DTC U0447 GMC?

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 U0447 GMC 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 U0447 GMC Code

1. What are the common symptoms of OBDII code U0447 in a GMC vehicle?

- Common symptoms include issues with the central gateway control module, such as communication failures, warning lights on the dashboard, and possible loss of certain vehicle functions.

2. What does the OBDII code U0447 GMC indicate?

- The U0447 code indicates that the engine control module (ECM) has detected invalid data from the central gateway control module, which serves as a communication hub for various vehicle systems.

3. What are the possible causes of the U0447 code in a GMC vehicle?

- Possible causes include a faulty central gateway control module, wiring or connection issues, software glitches, or a malfunctioning ECM.

4. How can I diagnose the U0447 code in my GMC vehicle?

- Diagnosing the U0447 code typically involves using a diagnostic scan tool to retrieve the code, checking for any related codes or warning lights, and inspecting the central gateway control module and its connections for any visible issues.

5. Can I drive my GMC vehicle with the U0447 code present?

- It is not recommended to drive your GMC vehicle with the U0447 code present, as it may lead to further communication failures between critical vehicle systems.

6. How can I repair the U0447 code in my GMC vehicle?

- Repairing the U0447 code may involve replacing the central gateway control module, addressing any wiring or connection issues, updating software, or reprogramming the ECM.

7. Is the U0447 code specific to GMC vehicles only?

- While the U0447 code is common in GMC vehicles, it can also be found in other makes and models that utilize OBDII systems with central gateway control modules.

8. Are there any DIY fixes for the U0447 code in a GMC vehicle?

- DIY fixes for the U0447 code may be limited, as it often requires specialized diagnostic equipment and expertise to properly diagnose and repair the underlying issue.

9. How much does it cost to repair the U0447 code in a GMC vehicle?

- Repair costs for the U0447 code can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can the U0447 code be intermittent in a GMC vehicle?

- Yes, the U0447 code can sometimes be intermittent, meaning it may come and go depending on the communication status between the central gateway control module and the ECM.