AutoCodes – Generic – U0443

U0443 Code - Invalid Data Received From Body Control Module 'B'

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) 'B', Body Control Module 'B' harness is open or shorted, Body Control Module 'B' 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: U0443 indicates Invalid Data Received From Body Control Module 'B'.
Common causes: Common causes include Faulty Body Control Module (BCM) 'B', Body Control Module 'B' harness is open or shorted, Body Control Module 'B' 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 6,016

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 U0443 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) 'B' causing its integrity to be questioned.

OBDII Code U0443 - Invalid Data Received From Body Control Module 'B' - AutoCodes.com — U0443 Code - Invalid Data Received From Body Control Module 'B'

What does this mean?

What are the Possible Causes of the DTC U0443?

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

How to Fix the DTC U0443?

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 U0443 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 U0443 Code

1. What are common symptoms of OBDII code U0443 (Invalid Data Received From Body Control Module 'B')?

- Common symptoms include issues with interior lights, power windows, door locks, and other body control functions.

2. What can cause the OBDII code U0443 to appear?

- The code can be triggered by wiring issues, a faulty body control module, software glitches, or communication network problems.

3. How can I diagnose the OBDII code U0443?

- Diagnosis involves checking the wiring for damage, inspecting the body control module, and using a diagnostic scanner to analyze communication data.

4. Is it safe to drive with the U0443 code present?

- It is generally safe to drive with this code, but you may experience inconvenience due to malfunctioning interior controls.

5. Can I repair the U0443 code myself?

- While some DIY enthusiasts can address this issue by checking wiring connections, it's recommended to consult a professional for accurate diagnosis and repair.

6. How much does it cost to fix the U0443 code?

- Repair costs can vary depending on the underlying cause, but expect to pay for diagnostic time, parts replacement, and labor fees.

7. Can resetting the OBDII system clear the U0443 code?

- Resetting the system may temporarily clear the code, but it's crucial to address the root cause to prevent it from reappearing.

8. Does the U0443 code affect vehicle performance?

- This code typically doesn't impact the vehicle's driving performance, but it can cause inconvenience by affecting body control functions.

9. Are there any preventive measures to avoid the U0443 code in the future?

- Regular vehicle maintenance, checking wiring integrity, and addressing electrical issues promptly can help prevent the recurrence of this code.

10. How long does it take to repair the U0443 code?

- The repair time can vary based on the specific cause of the code, but it may take a few hours to a day for diagnosis and resolution by a professional technician.