AutoCodes – Chevrolet – U01A1 2017 Chevrolet Silverado

U01A1 2017 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 2017 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 185

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 2017 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 2017 Chevrolet Silverado - Lost Communication with Hybrid/EV Battery Interface Control Module 2 - AutoCodes.com — U01A1 2017 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 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the U01A1 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01A1 2017 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 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U01A1 in a 2017 Chevrolet Silverado?

The common symptoms include issues with the hybrid or electric vehicle system, such as loss of power, difficulty starting the vehicle, or the vehicle going into a reduced power mode.

2. What are the possible causes of OBDII code U01A1 in a 2017 Chevrolet Silverado?

The code U01A1 typically indicates a communication problem between the vehicle's onboard computer and the hybrid/EV battery interface control module 2. This could be due to a wiring issue, a faulty control module, or a poor connection.

3. How can I diagnose the issue related to OBDII code U01A1 in my 2017 Chevrolet Silverado?

Diagnosing this issue may require advanced diagnostic tools to check the communication between the modules, inspecting the wiring harness for any damage, and testing the control module for proper functionality.

4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code U01A1?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/EV system. It's best to address the issue promptly to avoid potential safety hazards.

5. How can I repair OBDII code U01A1 in my 2017 Chevrolet Silverado?

Repairing this code may involve fixing any wiring issues, replacing the hybrid/EV battery interface control module 2 if necessary, and ensuring all connections are secure and functional.

6. Are there any DIY tips for addressing OBDII code U01A1 in a 2017 Chevrolet Silverado?

While some basic troubleshooting like checking for loose connections or damaged wires can be done by DIY enthusiasts, diagnosing and repairing this code may require professional assistance due to the complexity of the hybrid/EV system.

7. Is OBDII code U01A1 a common issue in the 2017 Chevrolet Silverado?

While it may not be as common as other OBDII codes, issues related to communication with the hybrid/EV battery interface control module 2 can occur in vehicles equipped with such systems, like the 2017 Chevrolet Silverado.

8. Can extreme weather conditions cause OBDII code U01A1 in a 2017 Chevrolet Silverado?

Extreme weather conditions, such as extreme heat or cold, can potentially affect the electrical components of the hybrid/EV system, leading to communication issues and triggering the U01A1 code.

9. Will resetting the OBDII code U01A1 in my 2017 Chevrolet Silverado make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and repair the root cause of the problem.

10. How much can I expect to pay for repairing OBDII code U01A1 in my 2017 Chevrolet Silverado?

The cost of repairing this code can vary depending on the specific issue, whether it's a simple wiring fix or a control module replacement. It's best to consult with a professional mechanic for an accurate diagnosis and cost estimate.