AutoCodes – Generic – U2618

U2618 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Battery Interface Control Module 6, Hybrid/EV Battery Interface Control Module 6 harness is open or shorted, Hybrid/EV Battery Interface Control Module 6 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: U2618 indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 6, Hybrid/EV Battery Interface Control Module 6 harness is open or shorted, Hybrid/EV Battery Interface Control Module 6 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 2,153

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 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2618 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
The scan tool does not communicate the Hybrid/EV Battery Interface Control Modules 6 on Battery Energy Control Module dedicated bus.
The Diagnostic Trouble Code (DTC) will set when there is no temperature report message from Hybrid/EV Battery Interface Control Modules 6 to Battery Energy Control Module within 4s.

OBDII Code U2618 - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6 - AutoCodes.com — U2618 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6

What does this mean?

What are the Possible Causes of the DTC U2618?

Faulty Hybrid/EV Battery Interface Control Module 6
Hybrid/EV Battery Interface Control Module 6 harness is open or shorted
Hybrid/EV Battery Interface Control Module 6 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2618?

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 U2618 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 U2618 code?

Need more information on how to fix the U2618 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2618 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2618 Buick — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6
U2618 Cadillac — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6
U2618 Chevrolet — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6
U2618 GMC — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 6

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 U2618 Code

1. What are the common symptoms of OBDII code U2618?

The common symptoms of OBDII code U2618 include the hybrid or electric vehicle not starting, reduced hybrid system performance, warning lights illuminated on the dashboard, and issues with battery energy control.

2. What causes the OBDII code U2618 to appear?

The code U2618 is typically triggered when there is a communication failure between the Battery Energy Control Module and the Hybrid/EV Battery Interface Control Module 6. This can be due to wiring issues, faulty modules, or poor connections.

3. How can I diagnose the OBDII code U2618?

Diagnosing code U2618 involves using a diagnostic scan tool to retrieve the code, checking the wiring and connections between the modules, and testing the modules themselves for any faults. Professional diagnostic equipment may be needed for a detailed diagnosis.

4. What are some repair tips for fixing OBDII code U2618?

Repair tips for resolving code U2618 include checking and repairing any damaged wiring or connectors, ensuring the modules are properly connected and functioning correctly, and resetting the fault codes after making any necessary repairs.

5. Can I drive my vehicle with the OBDII code U2618 present?

It is not recommended to drive your vehicle with the U2618 code present, as it can affect the performance and safety of the hybrid or electric system. It is advisable to address the issue promptly to prevent further damage.

6. Is it safe to continue using the hybrid system if the U2618 code is showing?

It is not safe to continue using the hybrid system if the U2618 code is present, as it indicates a communication failure between critical components. Continuing to use the system may lead to further issues and potentially cause damage to the vehicle.

7. How much does it typically cost to repair OBDII code U2618?

The cost of repairing code U2618 can vary depending on the extent of the issue, the labor rates of the repair shop, and the cost of any replacement parts that may be needed. It is advisable to obtain quotes from multiple repair shops for an accurate estimate.

8. Can a DIY enthusiast fix the OBDII code U2618 at home?

While some DIY enthusiasts may have the skills to diagnose and repair code U2618 at home, it is recommended to seek professional help due to the complexity of the hybrid or electric system. Incorrect repairs can lead to further damage or safety risks.

9. Will resetting the fault codes make the U2618 code disappear permanently?

Resetting the fault codes may clear the U2618 code temporarily, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and fix the root cause of the problem to prevent the code from coming back.

10. How urgent is it to address the OBDII code U2618?

It is recommended to address the U2618 code as soon as possible to prevent potential damage to the hybrid or electric system. Ignoring the code can lead to further issues and may result in more costly repairs down the line.