AutoCodes – GMC – U01A0 2015 GMC Sierra

U01A0 2015 GMC Sierra Code - Lost Communication with Hybrid/EV Battery Interface Control Module 1

Quick Answer

This diagnostic monitors the internal battery communication status between the Hybrid/EV Powertrain Control Module 2 and the Hybrid/EV Battery Interface Control Modules. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control 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: U01A0 2015 GMC Sierra indicates Lost Communication with Hybrid/EV Battery Interface Control Module 1.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control 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 173

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 Jul 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U01A0 2015 GMC Sierra Description

This diagnostic monitors the internal battery communication status between the Hybrid/EV Powertrain Control Module 2 and the Hybrid/EV Battery Interface Control Modules. The diagnostic monitors Hybrid/EV Battery Interface Control Modules data availability whenever this private communications bus is active. The communication network between Hybrid/EV Powertrain Control Module 2 and Hybrid/EV Battery Interface Control Modules is in a daisy-chain architecture. Therefore, a break at any point in the communication bus results in a loss of Hybrid/EV Battery Interface Control Modules communication with the Hybrid/EV Powertrain Control Module 2. If any data is received, the diagnostic will report a pass. If no data is received for greater than 4.5 s, the Hybrid/EV Powertrain Control Module 2 will attempt to initiate the Hybrid/EV Battery Interface Control Modules into a communication mode where the Hybrid/EV Battery Interface Control Modules can perform their own internal communication loop back, bypassing the daisy-chain. If this is the first Hybrid/EV Battery Interface Control Module in the daisy-chain that the Hybrid/EV Powertrain Control Module 2 cannot re-establish communication with, this diagnostic will fail. The Diagnostic Trouble Code (DTC) will be set when the Hybrid/EV Powertrain Control Module 2 has not received data from the Hybrid/EV Battery Interface Control Module 1 for more than 4.5 s.

OBDII Code U01A0 2015 GMC Sierra - Lost Communication with Hybrid/EV Battery Interface Control Module 1 - AutoCodes.com — U01A0 2015 GMC Sierra Code - Lost Communication with Hybrid/EV Battery Interface Control Module 1

What does this mean?

What are the Possible Causes of the DTC U01A0 2015 GMC Sierra?

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

How to Fix the DTC U01A0 2015 GMC Sierra?

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 U01A0 2015 GMC Sierra 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 U01A0 2015 GMC Sierra code?

Need more information on how to fix the U01A0 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01A0 2015 GMC Sierra 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 U01A0 2015 GMC Sierra Code

1. What does the OBDII code U01A0 mean for a 2015 GMC Sierra?

The code U01A0 indicates a communication issue with the Hybrid/EV Battery Interface Control Module 1 in your 2015 GMC Sierra.

2. What are the common symptoms of the U01A0 code in a GMC Sierra?

Common symptoms include the hybrid system warning light illuminating on the dashboard, decreased fuel efficiency, and potential drivability issues.

3. What are the possible causes of the U01A0 code in a 2015 GMC Sierra?

The code U01A0 can be triggered by issues such as damaged wiring, faulty control modules, poor connections, or software glitches within the hybrid/EV system.

4. How can I diagnose the U01A0 code in my GMC Sierra?

Diagnosing the U01A0 code typically involves using a scan tool to retrieve the specific details of the communication error and checking the wiring, connectors, and components related to the Hybrid/EV Battery Interface Control Module 1.

5. Can I continue driving my GMC Sierra with the U01A0 code present?

It is not recommended to drive your vehicle with the U01A0 code active, as it may lead to further damage to the hybrid/EV system components and potentially affect the overall performance of your vehicle.

6. How can I repair the U01A0 code in my 2015 GMC Sierra?

Repairing the U01A0 code may involve repairing or replacing damaged wiring, addressing faulty control modules, ensuring proper connections, and performing software updates as needed.

7. Is it possible to reset the U01A0 code in a GMC Sierra without fixing the underlying issue?

While you can clear the code temporarily, it is crucial to address the root cause of the communication problem to prevent the code from reoccurring and ensure the proper functioning of the hybrid/EV system.

8. Are there any recalls or technical service bulletins related to the U01A0 code in a 2015 GMC Sierra?

It is advisable to check with a GMC dealership or online resources for any relevant recalls or technical service bulletins related to the U01A0 code in your specific vehicle model and year.

9. Can a DIY enthusiast fix the U01A0 code in a GMC Sierra, or is it best left to professionals?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing issues related to the U01A0 code may require specialized knowledge and tools, making it advisable to seek professional assistance.

10. How much can I expect to pay for repairing the U01A0 code in a 2015 GMC Sierra?

The cost of repairing the U01A0 code can vary depending on the extent of the issue, parts needed for replacement, labor costs, and whether the repair is done at a dealership or an independent mechanic. It is recommended to obtain quotes from different service providers for an accurate estimate.