AutoCodes – Generic – U0439

U0439 Code - Invalid Data Received From All Terrain 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 All Terrain Control Module, All Terrain Control Module harness is open or shorted, All Terrain 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: U0439 indicates Invalid Data Received From All Terrain Control Module.
Common causes: Common causes include Faulty All Terrain Control Module, All Terrain Control Module harness is open or shorted, All Terrain 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 6,538

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 U0439 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 All Terrain Control Module causing its integrity to be questioned.

OBDII Code U0439 - Invalid Data Received From All Terrain Control Module - AutoCodes.com — U0439 Code - Invalid Data Received From All Terrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0439?

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

How to Fix the DTC U0439?

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 U0439 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 U0439 Code

1. What are the common symptoms of OBDII code U0439 (Invalid Data Received From All Terrain Control Module)?

- Common symptoms include the traction control system not functioning properly, the stability control light illuminating on the dashboard, and potential loss of stability and traction while driving.

2. What are the possible causes of OBDII code U0439?

- The code U0439 can be triggered by issues such as a faulty All Terrain Control Module, damaged wiring or connectors in the system, or communication errors between various control modules in the vehicle.

3. How can I diagnose OBDII code U0439?

- Diagnosing code U0439 typically involves using a professional OBDII scanner to retrieve the code and then conducting a thorough inspection of the traction control system, wiring, and connectors for any visible damage or issues.

4. Can I still drive my vehicle with OBDII code U0439?

- It is not recommended to drive your vehicle with code U0439 active, as it can impact the stability and traction control systems, potentially compromising your safety on the road. It is advisable to have the issue diagnosed and repaired promptly.

5. How can I repair OBDII code U0439?

- Repairing code U0439 often involves addressing the root cause of the issue, which may include replacing a faulty All Terrain Control Module, repairing damaged wiring or connectors, or reprogramming control modules to restore proper communication.

6. Is it safe to reset the OBDII code U0439 without fixing the underlying issue?

- Resetting the code without addressing the underlying problem may temporarily clear the error code, but the issue will likely reoccur. It is essential to diagnose and repair the root cause to ensure the proper functioning of the traction control system.

7. Can extreme weather conditions trigger OBDII code U0439?

- Extreme weather conditions such as heavy rain or snow can potentially exacerbate existing issues in the traction control system, leading to the activation of code U0439. It is important to maintain the system properly to prevent weather-related malfunctions.

8. How long does it typically take to repair OBDII code U0439?

- The repair time for code U0439 can vary depending on the specific cause of the issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may require additional time for diagnosis and repair.

9. Can a DIY enthusiast fix OBDII code U0439 at home?

- DIY enthusiasts with the necessary tools and automotive knowledge may be able to diagnose and repair code U0439 at home, especially if the issue is related to damaged wiring or connectors. However, complex issues may require professional diagnosis and repair.

10. How can I prevent OBDII code U0439 from recurring in the future?

- To prevent code U0439 from recurring, it is essential to maintain the traction control system properly, address any issues promptly, and ensure regular inspections and maintenance of the system to catch potential problems early.