AutoCodes – Generic – U1862

U1862 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 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.

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Code Popularity 1,710

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

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

U1862 Buick — Battery Energy Control Module Lost Communication With Serial Data Gateway Module
U1862 Cadillac — Battery Energy Control Module Lost Communication With Serial Data Gateway Module
U1862 Chevrolet — Battery Energy Control Module Lost Communication With Serial Data Gateway Module
U1862 GMC — Battery Energy Control Module Lost Communication With Serial Data Gateway Module

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 Code

1. What are common symptoms of OBDII code U1862?

- Common symptoms include check engine light illumination, loss of communication between the battery energy control module and serial data gateway module, and potential issues with vehicle power management.

2. What could cause the U1862 code to trigger?

- The U1862 code is typically triggered when there is a communication breakdown between the battery energy control module and the serial data gateway module, which can be caused by wiring issues, faulty modules, or software malfunctions.

3. How can I diagnose the U1862 code?

- Diagnosing the U1862 code involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors between the battery energy control module and the serial data gateway module, and performing a thorough inspection of the modules themselves.

4. What are some repair tips for resolving the U1862 code?

- Repair tips for resolving the U1862 code may include repairing or replacing damaged wiring, ensuring proper connections between modules, updating software as necessary, and replacing faulty modules if needed.

5. Can the U1862 code be fixed without professional help?

- While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving the U1862 code often requires specialized diagnostic equipment and expertise. It is recommended to seek professional help for accurate diagnosis and repair.

6. Is it safe to continue driving with the U1862 code present?

- It is generally not recommended to continue driving with the U1862 code present, as it can potentially affect the vehicle's power management system and lead to further issues. It is best to address the problem promptly to prevent any potential safety hazards.

7. Will resetting the fault codes make the U1862 code disappear?

- Resetting the fault codes may temporarily clear the U1862 code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the code to prevent it from coming back.

8. How much does it typically cost to repair the U1862 code?

- The cost of repairing the U1862 code can vary depending on the underlying cause, the extent of the repairs needed, and labor costs. It is advisable to obtain quotes from reputable automotive professionals for an accurate estimate.

9. Can extreme weather conditions contribute to the U1862 code being triggered?

- Extreme weather conditions, such as high temperatures or excessive moisture, can potentially affect the electrical components involved in the communication between the battery energy control module and the serial data gateway module, leading to the U1862 code being triggered.

10. Are there any preventive measures to avoid the U1862 code in the future?

- To help prevent the U1862 code from recurring, regular maintenance checks on the vehicle's electrical system, keeping connectors clean and secure, and addressing any issues promptly can help maintain the proper communication between modules and reduce the likelihood of the code appearing again.