AutoCodes – Generic – U0449

U0449 Code - Invalid Data Received From Gateway Control Module 'C'

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 Gateway Control Module 'C', Gateway Control Module 'C' harness is open or shorted, Gateway Control Module 'C' 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: U0449 indicates Invalid Data Received From Gateway Control Module 'C'.
Common causes: Common causes include Faulty Gateway Control Module 'C', Gateway Control Module 'C' harness is open or shorted, Gateway Control Module 'C' 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 5,697

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 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0449 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 Gateway Control Module 'C' causing its integrity to be questioned.

OBDII Code U0449 - Invalid Data Received From Gateway Control Module 'C' - AutoCodes.com — U0449 Code - Invalid Data Received From Gateway Control Module 'C'

What does this mean?

What are the Possible Causes of the DTC U0449?

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

How to Fix the DTC U0449?

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 U0449 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 U0449 Code

1. What does the OBDII code U0449 mean?

U0449 indicates that the vehicle's control modules have received invalid or corrupted data from the Gateway Control Module 'C'.

2. What are the common symptoms of the U0449 code?

Symptoms may include illuminated warning lights (like the check engine light), communication errors between modules, erratic vehicle behavior, or failure of specific systems like ABS or traction control.

3. What causes the U0449 code to appear?

Common causes include a faulty Gateway Control Module 'C', damaged wiring or connectors, software glitches, or interference in the communication network.

4. Can a low battery cause the U0449 code?

Yes, a weak or low battery can lead to voltage drops that disrupt communication between modules, potentially triggering the U0449 code.

5. How do you diagnose the U0449 code?

Diagnose by using a scan tool to check for related codes, inspecting wiring and connectors for damage, and testing the Gateway Control Module 'C' for proper function.

6. Can the U0449 code cause drivability issues?

It depends on the affected systems. In some cases, it may cause minor issues like warning lights, but in others, it could lead to reduced functionality of critical systems.

7. Should the Gateway Control Module 'C' always be replaced for the U0449 code?

Not necessarily. The fault could be due to wiring issues, loose connections, or software problems. Proper diagnosis is essential before replacing the module.

8. How much does it cost to fix the U0449 code?

Repair costs vary widely depending on the root cause. Wiring repairs may cost $100-$200, while replacing the Gateway Control Module can cost $300-$800 or more, including labor.

9. Can I drive my car with the U0449 code active?

It’s possible to drive with this code, but it's not recommended as it may indicate issues with critical systems that could affect safety or performance.

10. How can I prevent the U0449 code from recurring?

Regular maintenance, ensuring battery health, and addressing wiring or connection issues promptly can help prevent the U0449 code from reappearing.