AutoCodes – Buick – U1862 Buick

U1862 Buick Code - Battery Energy Control Module Lost Communication With Serial Data Gateway Module

Quick Answer

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Serial Data Gateway Module, Serial Data Gateway Module harness is open or shorted, Serial Data Gateway 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: U1862 Buick indicates Battery Energy Control Module Lost Communication With Serial Data Gateway Module.
Common causes: Common causes include Faulty Serial Data Gateway Module, Serial Data Gateway Module harness is open or shorted, Serial Data Gateway 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 541

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 Jun 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1862 Buick Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module. A module with a CAN serial data circuits malfunction or which loses power during the current ignition cycle will have a Loss of Communication Diagnostic Trouble Code (DTC) set by other modules that depend on information from that failed module. If any of the CAN circuit are shorted to battery voltage, ground, or between them no communication is possible on the CAN serial data bus, a Diagnostic Trouble Code will set.

OBDII Code U1862 Buick - Battery Energy Control Module Lost Communication With Serial Data Gateway Module - AutoCodes.com — U1862 Buick Code - Battery Energy Control Module Lost Communication With Serial Data Gateway Module

What does this mean?

What are the Possible Causes of the DTC U1862 Buick?

Faulty Serial Data Gateway Module
Serial Data Gateway Module harness is open or shorted
Serial Data Gateway Module circuit poor electrical connection

How to Fix the DTC U1862 Buick?

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 U1862 Buick 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 U1862 Buick code?

Need more information on how to fix the U1862 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1862 Buick code diagnosed by a professional: Find a repair shop in your area

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 U1862 Buick Code

1. What are the common symptoms of OBDII code U1862 in a Buick?

- Common symptoms include issues with the battery energy control module, communication errors with the serial data gateway module, and potential drivability issues.

2. What can cause the U1862 code in a Buick?

- The U1862 code is typically caused by a loss of communication between the battery energy control module and the serial data gateway module due to wiring issues, a faulty module, or software glitches.

3. How can I diagnose the U1862 code in my Buick?

- Diagnosing the U1862 code involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring connections between the modules, and testing the modules for functionality.

4. Can I still drive my Buick with the U1862 code present?

- It is not recommended to drive your Buick with the U1862 code present, as it can lead to potential electrical system malfunctions and drivability issues.

5. How can I repair the U1862 code in my Buick?

- Repairing the U1862 code may involve repairing or replacing damaged wiring, replacing a faulty battery energy control module or serial data gateway module, and performing any necessary software updates.

6. Are there any DIY tips for fixing the U1862 code in a Buick?

- DIY tips for fixing the U1862 code include checking and cleaning the wiring connections, ensuring proper module installations, and consulting the vehicle's service manual for specific troubleshooting steps.

7. How much does it cost to repair the U1862 code in a Buick?

- The cost of repairing the U1862 code can vary depending on the extent of the issue, the parts needed for replacement, and whether professional labor is required. It is recommended to obtain quotes from reputable mechanics or dealerships.

8. Can a faulty battery energy control module cause the U1862 code in a Buick?

- Yes, a faulty battery energy control module can cause the U1862 code by disrupting communication with the serial data gateway module, leading to the loss of communication error.

9. Is the U1862 code in a Buick a common issue?

- While the U1862 code may not be as common as other OBDII codes, it can still occur in Buick vehicles, especially in cases of electrical system malfunctions or communication errors between modules.

10. How can I prevent the U1862 code from reoccurring in my Buick?

- To prevent the U1862 code from reoccurring, it is essential to maintain regular vehicle maintenance, address any electrical issues promptly, and follow proper diagnostic procedures to ensure all modules are functioning correctly.