AutoCodes – Generic – U0431

U0431 Code - Invalid Data Received From Body Control Module 'A'

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 Body Control Module (BCM) 'A', Body Control Module 'A' harness is open or shorted, Body Control Module 'A' 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: U0431 indicates Invalid Data Received From Body Control Module 'A'.
Common causes: Common causes include Faulty Body Control Module (BCM) 'A', Body Control Module 'A' harness is open or shorted, Body Control Module 'A' 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 23,656

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 U0431 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 Body Control Module (BCM) 'A' causing its integrity to be questioned.

OBDII Code U0431 - Invalid Data Received From Body Control Module 'A' - AutoCodes.com — U0431 Code - Invalid Data Received From Body Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U0431?

Faulty Body Control Module (BCM) 'A'
Body Control Module 'A' harness is open or shorted
Body Control Module 'A' circuit poor electrical connection

How to Fix the DTC U0431?

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 U0431 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.

Need more information about the U0431 code?

Need more information on how to fix the U0431 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0431 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0431 Buick — Invalid Data Received From Body Control Module 'A'
U0431 Cadillac — Invalid Data Received From Body Control Module 'A'
U0431 Chevrolet — Invalid Data Received From Body Control Module 'A'
U0431 Chrysler — Invalid Data Received From Body Control Module 'A'
U0431 Dodge — Invalid Data Received From Body Control Module 'A'
U0431 GMC — Invalid Data Received From Body Control Module 'A'
U0431 Jeep — Invalid Data Received From Body Control Module 'A'
U0431 RAM — Invalid Data Received From Body Control Module 'A'

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 U0431 Code

1. What are the common symptoms of OBDII code U0431?

The common symptoms of code U0431 include issues with interior lights, power windows, door locks, and other body control module functions.

2. What causes the OBDII code U0431 to appear?

The code U0431 typically appears when the body control module 'A' sends invalid data to the engine control module. This can be due to wiring issues, a faulty control module, or communication network problems.

3. How can I diagnose the OBDII code U0431?

Diagnosing code U0431 involves using a diagnostic scanner to retrieve the code, checking for other related codes, inspecting the wiring harness for damage, and testing the body control module for proper operation.

4. Can a DIYer repair the OBDII code U0431?

While some DIYers may be able to address the OBDII code U0431 by checking and repairing wiring connections, it is recommended to consult a professional mechanic for a thorough diagnosis and repair.

5. How much does it cost to fix the OBDII code U0431?

The cost of fixing code U0431 can vary depending on the underlying cause. Repair costs may include labor charges for diagnosis and repair, as well as potential costs for parts replacement.

6. Are there any temporary fixes for the OBDII code U0431?

There are no recommended temporary fixes for code U0431, as addressing the root cause of the issue is crucial to ensure the proper functioning of the body control module and related systems.

7. Can driving with the OBDII code U0431 cause further damage to the vehicle?

Continuing to drive with code U0431 may lead to further malfunctions in body control module functions and other related systems. It is advisable to address the issue promptly to prevent potential complications.

8. How long does it take to repair the OBDII code U0431?

The repair time for code U0431 can vary based on the diagnostic process, availability of parts, and the complexity of the repair. It is best to consult with a professional technician for a more accurate estimate.

9. Is it safe to ignore the OBDII code U0431?

Ignoring code U0431 may result in persistent issues with body control module functions and could impact the overall performance and safety of the vehicle. It is recommended to address the code promptly.

10. Can extreme weather conditions trigger the OBDII code U0431?

Extreme weather conditions can potentially affect the electrical components of the body control module, leading to communication errors and triggering code U0431. Ensuring proper vehicle maintenance can help mitigate such issues.