AutoCodes – Chevrolet – U185A Chevrolet

U185A Chevrolet Code - Lost Communication With Battery Energy Control Module On High Voltage Energy Management CAN Bus

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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: U185A Chevrolet indicates Lost Communication With Battery Energy Control Module On High Voltage Energy Management CAN Bus.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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 1,576

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 Jun 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U185A Chevrolet Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received for more than 500 ms.

OBDII Code U185A Chevrolet - Lost Communication With Battery Energy Control Module On High Voltage Energy Management CAN Bus - AutoCodes.com — U185A Chevrolet Code - Lost Communication With Battery Energy Control Module On High Voltage Energy Management CAN Bus

What does this mean?

What are the Possible Causes of the DTC U185A Chevrolet?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC U185A Chevrolet?

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 U185A Chevrolet 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 U185A Chevrolet code?

Need more information on how to fix the U185A Chevrolet code? Get Access to Factory Service Manuals

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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 U185A Chevrolet Code

1. What are common symptoms of OBDII code U185A in a Chevrolet related to the high voltage energy management CAN bus?

- Common symptoms include loss of communication with the battery energy control module, warning lights on the dashboard, and potential issues with high voltage system operation.

2. What are some possible causes of the U185A code indicating lost communication with the battery energy control module in a Chevrolet?

- Causes can include wiring issues, loose connections, a faulty battery energy control module, software glitches, or problems with the high voltage energy management CAN bus.

3. How can I diagnose the U185A code in my Chevrolet related to the high voltage energy management CAN bus communication loss?

- Diagnosing the issue may involve checking for loose connections, inspecting the wiring harness, verifying the battery energy control module functionality, and using a diagnostic scanner to communicate with the module.

4. What should I do if I encounter the U185A trouble code in my Chevrolet?

- If you encounter the U185A code, it is recommended to have the vehicle inspected by a qualified technician to determine the exact cause and necessary repairs.

5. Are there any safety precautions to consider when dealing with the U185A code in a Chevrolet high voltage energy management system?

- When working on high voltage systems, always follow proper safety procedures outlined by the manufacturer and consider the risks associated with handling high voltage components.

6. Can I reset the U185A trouble code in my Chevrolet by disconnecting the battery?

- While disconnecting the battery may clear some trouble codes, it is recommended to properly diagnose and address the root cause of the U185A code to prevent it from reoccurring.

7. Is it possible to drive my Chevrolet with the U185A code present indicating lost communication with the battery energy control module?

- It is not advisable to continue driving the vehicle with unresolved communication issues related to the high voltage energy management system, as it may impact vehicle performance and safety.

8. How much does it typically cost to repair the U185A code in a Chevrolet involving the battery energy control module communication loss?

- Repair costs for the U185A code can vary depending on the exact cause of the issue, but it is recommended to obtain a professional diagnosis to determine the necessary repairs and associated costs.

9. Can a DIY enthusiast with automotive knowledge fix the U185A trouble code related to the high voltage energy management CAN bus in a Chevrolet?

- Repairing the U185A code may require specialized tools and expertise related to high voltage systems, so it is recommended to consult with a professional technician for proper diagnosis and repair.

10. How can regular maintenance help prevent issues like the U185A trouble code in a Chevrolet's high voltage energy management system?

- Regular maintenance, including checking connections, inspecting wiring, and ensuring software updates are current, can help prevent issues like the U185A code related to the battery energy control module communication loss.