AutoCodes – Chevrolet – U01A1 2014 Chevrolet Silverado

U01A1 2014 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 2014 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 199

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U01A1 2014 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 2014 Chevrolet Silverado - Lost Communication with Hybrid/EV Battery Interface Control Module 2 - AutoCodes.com — U01A1 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the U01A1 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01A1 2014 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 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U01A1 in a 2014 Chevrolet Silverado?

- Common symptoms include loss of communication with the Hybrid/EV Battery Interface Control Module 2, illuminated warning lights on the dashboard, and potential drivability issues.

2. What causes the OBDII code U01A1 in a 2014 Chevrolet Silverado?

- The code U01A1 typically indicates a communication problem between the vehicle's onboard diagnostic system and the Hybrid/EV Battery Interface Control Module 2. This can be caused by wiring issues, a faulty module, or a software glitch.

3. How can I diagnose the OBDII code U01A1 in my 2014 Chevrolet Silverado?

- Diagnosing the code U01A1 requires using a diagnostic scanner to communicate with the vehicle's system and retrieve specific trouble codes. A thorough inspection of the wiring and connectors related to the Hybrid/EV Battery Interface Control Module 2 is also recommended.

4. Can I still drive my 2014 Chevrolet Silverado with the U01A1 code present?

- While it may be possible to drive the vehicle with the U01A1 code present, it is not recommended. Continuing to drive with communication issues between critical modules can potentially lead to further damage or safety concerns.

5. How can I repair the OBDII code U01A1 in my 2014 Chevrolet Silverado?

- Repairing the U01A1 code often involves addressing the root cause of the communication problem. This may include repairing damaged wiring, replacing faulty components, or updating software as necessary.

6. Is it safe to reset the OBDII code U01A1 without addressing the underlying issue?

- Resetting the code without fixing the underlying problem is not recommended. The issue causing the communication error between modules should be diagnosed and repaired to ensure the vehicle operates safely and efficiently.

7. Can a DIY enthusiast fix the OBDII code U01A1 in a 2014 Chevrolet Silverado?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the U01A1 code. However, complex electrical issues may require professional expertise.

8. Will the U01A1 code cause my 2014 Chevrolet Silverado to fail an emissions test?

- The U01A1 code itself may not directly cause your vehicle to fail an emissions test. However, unresolved communication issues between modules can impact the overall performance and emissions of the vehicle.

9. How long does it typically take to repair the U01A1 code in a 2014 Chevrolet Silverado?

- The time required to repair the U01A1 code can vary depending on the underlying cause and complexity of the issue. Simple fixes may take a few hours, while more involved repairs could require professional assistance and more time.

10. Is the U01A1 code a common issue in 2014 Chevrolet Silverado vehicles?

- While the U01A1 code specifically related to communication with the Hybrid/EV Battery Interface Control Module 2 may not be extremely common, communication issues between modules can occur in various vehicles, including the 2014 Chevrolet Silverado.