AutoCodes – Chevrolet – U01A1 2015 Chevrolet Silverado

U01A1 2015 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Battery Interface Control Module 2

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: U01A1 2015 Chevrolet Silverado indicates Lost Communication with Hybrid/EV Battery Interface Control Module 2.
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 193

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 U01A1 2015 Chevrolet Silverado 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 2 for more than 4.5 s.

OBDII Code U01A1 2015 Chevrolet Silverado - Lost Communication with Hybrid/EV Battery Interface Control Module 2 - AutoCodes.com — U01A1 2015 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Battery Interface Control Module 2

What does this mean?

What are the Possible Causes of the DTC U01A1 2015 Chevrolet Silverado?

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 U01A1 2015 Chevrolet Silverado?

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 U01A1 2015 Chevrolet Silverado 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 U01A1 2015 Chevrolet Silverado code?

Need more information on how to fix the U01A1 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01A1 2015 Chevrolet Silverado 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 U01A1 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U01A1 in a 2015 Chevrolet Silverado?

- Common symptoms include the check engine light illuminating, loss of communication with the hybrid/EV battery interface control module 2, and potential drivability issues.

2. What can cause the OBDII code U01A1 in a 2015 Chevrolet Silverado?

- Possible causes of this code can include wiring issues, a faulty hybrid/EV battery interface control module 2, or problems with the communication network.

3. How serious is the OBDII code U01A1 in a 2015 Chevrolet Silverado?

- While the vehicle may still be operable with this code, it is important to address the underlying issue promptly to prevent potential drivability problems and further damage.

4. How can I diagnose the OBDII code U01A1 in my 2015 Chevrolet Silverado?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes, checking the wiring connections, and testing the hybrid/EV battery interface control module 2.

5. Can I repair the OBDII code U01A1 issue in my 2015 Chevrolet Silverado myself?

- Depending on your skill level and access to tools, you may be able to address simpler causes like loose connections or corroded wiring. More complex issues may require professional diagnosis and repair.

6. Is it safe to continue driving my 2015 Chevrolet Silverado with the U01A1 code?

- It is generally not recommended to drive the vehicle extensively with this code present, as it may lead to unexpected drivability issues and potential damage to the hybrid/EV system.

7. How much does it typically cost to repair the U01A1 code in a 2015 Chevrolet Silverado?

- Repair costs can vary depending on the exact cause of the issue. Simple fixes like reconnecting wires may be inexpensive, while replacing the control module or addressing wiring issues can be more costly.

8. Can the U01A1 code be triggered by a dead or failing hybrid/EV battery in a 2015 Chevrolet Silverado?

- Yes, a dead or failing hybrid/EV battery can potentially trigger communication issues with the control module, leading to the U01A1 trouble code.

9. Are there any recalls or service bulletins related to the U01A1 code in a 2015 Chevrolet Silverado?

- It's advisable to check with a Chevrolet dealership or online resources to see if there are any relevant recalls or service bulletins addressing this specific code for your vehicle.

10. How long does it typically take to repair the U01A1 code issue in a 2015 Chevrolet Silverado?

- The repair time can vary based on the complexity of the problem and the availability of parts. Simple fixes may take a short time, while more involved repairs could require a day or more.