AutoCodes – Chevrolet – U01A1 2016 Chevrolet Silverado

U01A1 2016 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 2016 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 174

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 2016 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 2016 Chevrolet Silverado - Lost Communication with Hybrid/EV Battery Interface Control Module 2 - AutoCodes.com — U01A1 2016 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 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the U01A1 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01A1 2016 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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U01A1 in a 2016 Chevrolet Silverado?

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

2. What does the OBDII code U01A1 indicate in a 2016 Chevrolet Silverado?

- The code U01A1 signifies a communication problem between the vehicle's onboard diagnostic system and the hybrid/EV battery interface control module 2.

3. What are some possible causes of the U01A1 code in a 2016 Chevrolet Silverado?

- Potential causes include wiring issues, a faulty battery interface control module 2, software glitches, or a malfunction in the hybrid/EV system components.

4. How can I diagnose the U01A1 code in my 2016 Chevrolet Silverado?

- Diagnosing the code may involve checking the wiring connections, inspecting the battery interface control module 2, scanning for additional trouble codes, and using diagnostic tools to pinpoint the communication failure.

5. Can I continue driving my 2016 Chevrolet Silverado with the U01A1 code present?

- It is not recommended to drive the vehicle with the U01A1 code active, as it can affect the performance and reliability of the hybrid/EV system. It is advisable to address the issue promptly.

6. How can I repair the U01A1 code in my 2016 Chevrolet Silverado?

- Repair methods may include fixing wiring issues, replacing the faulty battery interface control module 2, updating software, or seeking assistance from a certified mechanic with experience in hybrid/EV systems.

7. Are there any precautions I should take when dealing with the U01A1 code in my 2016 Chevrolet Silverado?

- It is essential to follow proper safety protocols and disconnect the vehicle's battery before attempting any repairs related to the hybrid/EV system to prevent electrical hazards.

8. Can a DIY enthusiast fix the U01A1 code issue in a 2016 Chevrolet Silverado?

- While some basic troubleshooting steps can be performed by a knowledgeable DIY enthusiast, resolving complex issues related to the U01A1 code may require specialized tools and expertise best handled by a professional technician.

9. How much does it typically cost to repair the U01A1 code in a 2016 Chevrolet Silverado?

- The repair costs for the U01A1 code can vary depending on the underlying cause, parts needed, and labor fees. It is advisable to obtain quotes from reputable repair shops for an accurate estimate.

10. Is the U01A1 code a common issue in 2016 Chevrolet Silverado vehicles?

- The U01A1 code related to lost communication with the hybrid/EV battery interface control module 2 can occur in 2016 Chevrolet Silverado vehicles equipped with hybrid or electric powertrains, though its frequency may vary.