AutoCodes – GMC – U2602 GMC

U2602 GMC Code - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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: U2602 GMC indicates Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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 501

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 U2602 GMC 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.
This diagnostic is used to check the loss of communication with the Hybrid/EV Powertrain Control Module 2 on a high-speed General Motors Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module 2. If this message is not received within 400 ms, the Battery Energy Control Module increases its fail count. When this fail count is over X Cal Value (7) during Y Cal Value (10 samples), the diagnostic status of this code is set to Failed and transmitted over high voltage energy high-speed GMLAN bus to the Hybrid/EV Powertrain Control Module 2.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received within 400 ms.

OBDII Code U2602 GMC - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 - AutoCodes.com — U2602 GMC Code - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2

What does this mean?

What are the Possible Causes of the DTC U2602 GMC?

Faulty Hybrid/EV Powertrain Control Module 2
Hybrid/EV Powertrain Control Module 2 harness is open or shorted
Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC U2602 GMC?

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 U2602 GMC 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 U2602 GMC Code

1. What are the common symptoms of OBDII code U2602 in a GMC vehicle?

- Common symptoms include loss of communication between the Battery Energy Control Module and Hybrid/EV Powertrain Control Module 2, reduced hybrid system performance, and warning lights on the dashboard.

2. What are the possible causes of OBDII code U2602 in a GMC vehicle?

- Possible causes include faulty wiring or connectors, a malfunctioning Battery Energy Control Module, issues with the Hybrid/EV Powertrain Control Module 2, or software glitches.

3. How can I diagnose OBDII code U2602 in my GMC vehicle?

- Diagnosis involves using a professional OBDII scanner to retrieve the specific code, checking for any related trouble codes, inspecting the wiring and connectors, and performing communication tests between the modules.

4. Can I continue driving my GMC vehicle with OBDII code U2602 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the hybrid system's performance and potentially lead to further damage. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code U2602 in a GMC vehicle?

- Repair tips include checking and repairing any damaged wiring or connectors, ensuring the modules have the latest software updates, and consulting with a professional technician for further diagnosis and repair.

6. Is it possible to reset OBDII code U2602 in a GMC vehicle without addressing the underlying issue?

- While you can clear the code with an OBDII scanner, it is essential to address the root cause of the problem to prevent the code from reappearing and ensure the hybrid system functions properly.

7. How much does it typically cost to repair OBDII code U2602 in a GMC vehicle?

- The cost of repair can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to get a diagnosis from a professional technician for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code U2602 in a GMC vehicle?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, addressing OBDII code U2602 may require specialized knowledge and tools. It is recommended to consult with a professional technician for proper diagnosis and repair.

9. How long does it take to repair OBDII code U2602 in a GMC vehicle?

- The repair time can vary depending on the complexity of the issue causing the code and the availability of parts. Some repairs may be completed in a few hours, while others may take longer if extensive diagnosis and testing are required.

10. Will OBDII code U2602 cause my GMC vehicle to fail an emissions test?

- Yes, OBDII code U2602 can cause your GMC vehicle to fail an emissions test, as it indicates a problem with the hybrid system's communication. It is important to address the issue before undergoing an emissions test.