AutoCodes – Chevrolet – U2603 Chevrolet

U2603 Chevrolet Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1

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 1, Hybrid/EV Battery Interface Control Module 1 harness is open or shorted, Hybrid/EV Battery Interface Control Module 1 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: U2603 Chevrolet indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 1, Hybrid/EV Battery Interface Control Module 1 harness is open or shorted, Hybrid/EV Battery Interface Control Module 1 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 1,898

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 U2603 Chevrolet 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 1 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 1 to Battery Energy Control Module within 4s.

OBDII Code U2603 Chevrolet - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1 - AutoCodes.com — U2603 Chevrolet Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1

What does this mean?

What are the Possible Causes of the DTC U2603 Chevrolet?

Faulty Hybrid/EV Battery Interface Control Module 1
Hybrid/EV Battery Interface Control Module 1 harness is open or shorted
Hybrid/EV Battery Interface Control Module 1 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2603 Chevrolet?

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 U2603 Chevrolet 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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Get the U2603 Chevrolet 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 U2603 Chevrolet Code

1. What are the common symptoms of OBDII code U2603 in a Chevrolet vehicle?

The common symptoms of OBDII code U2603 include the hybrid or electric vehicle not starting, loss of power, and warning lights on the dashboard related to the battery system.

2. What are the possible causes of OBDII code U2603 in a Chevrolet?

Possible causes of OBDII code U2603 in a Chevrolet include a faulty Battery Energy Control Module, issues with the Hybrid/EV Battery Interface Control Module 1, wiring issues, or a communication network problem.

3. How can I diagnose OBDII code U2603 in my Chevrolet?

Diagnosing OBDII code U2603 typically involves using a professional OBDII scanner to read the code, checking the battery systems for any visible damage or loose connections, and testing the communication between the modules.

4. What should I do if my Chevrolet shows OBDII code U2603?

If your Chevrolet shows OBDII code U2603, it is recommended to have the vehicle inspected by a qualified technician to determine the exact cause of the issue and perform necessary repairs.

5. Can I still drive my Chevrolet with OBDII code U2603 present?

It is not recommended to drive your Chevrolet with OBDII code U2603 present, as it may lead to further damage to the hybrid or electric vehicle system. It's best to have the issue addressed as soon as possible.

6. How much does it cost to repair OBDII code U2603 in a Chevrolet?

The cost to repair OBDII code U2603 in a Chevrolet can vary depending on the exact cause of the issue. It is advisable to get a diagnostic from a professional to determine the cost of repairs accurately.

7. Are there any DIY repair tips for OBDII code U2603 in a Chevrolet?

DIY repair for OBDII code U2603 is not recommended due to the complexity of the hybrid or electric vehicle system. It is best to leave the diagnosis and repair to a qualified technician.

8. How long does it take to repair OBDII code U2603 in a Chevrolet?

The repair time for OBDII code U2603 in a Chevrolet can vary depending on the cause of the issue and the availability of parts. It is best to consult with a technician for an accurate estimate of repair time.

9. Can OBDII code U2603 in a Chevrolet be a recurring issue?

OBDII code U2603 in a Chevrolet can be a recurring issue if the root cause of the problem is not properly addressed during repairs. It is essential to ensure that all necessary repairs are carried out to prevent the code from reappearing.

10. Is OBDII code U2603 specific to Chevrolet vehicles only?

OBDII code U2603, indicating Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1, is specific to hybrid or electric Chevrolet vehicles with the corresponding control modules.