AutoCodes – Buick – U185A Buick

U185A Buick 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 Buick 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 433

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 Buick 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 Buick - Lost Communication With Battery Energy Control Module On High Voltage Energy Management CAN Bus - AutoCodes.com — U185A Buick 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 Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

1. What are the common symptoms of OBDII code U185A in a Buick related to the Battery Energy Control Module communication loss?

- Common symptoms include loss of communication with the Battery Energy Control Module, hybrid system malfunction indicator lights, and potentially a decrease in fuel efficiency.

2. What are the possible causes of OBDII code U185A in a Buick indicating a communication issue with the Battery Energy Control Module?

- The code U185A can be triggered by issues such as a faulty Battery Energy Control Module, damaged wiring or connectors, software glitches, or a malfunctioning high-voltage energy management CAN bus.

3. How can I diagnose the source of the communication problem with the Battery Energy Control Module to resolve OBDII code U185A in my Buick?

- Diagnosis involves thorough inspection of wiring and connectors, checking the Battery Energy Control Module for functionality, and using a diagnostic scan tool to pinpoint the exact communication fault.

4. Is it safe to continue driving my Buick when OBDII code U185A related to the Battery Energy Control Module communication loss is present?

- It is not recommended to continue driving with this code present, as it may lead to further issues with the high-voltage system in the vehicle.

5. Can I reset the OBDII code U185A in my Buick related to the Battery Energy Control Module communication loss by disconnecting the battery?

- While disconnecting the battery may clear the code temporarily, it is crucial to address the underlying communication issue with the Battery Energy Control Module for a proper repair.

6. Are there specific repair tips for resolving OBDII code U185A linked to the Battery Energy Control Module communication loss in a Buick?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, updating software if available, and replacing the Battery Energy Control Module if necessary.

7. How can a professional mechanic help in diagnosing and repairing OBDII code U185A associated with the Battery Energy Control Module in a Buick?

- A professional mechanic can utilize advanced diagnostic tools, technical expertise, and manufacturer-specific knowledge to accurately diagnose and repair the communication issue with the Battery Energy Control Module.

8. What impact does OBDII code U185A related to the Battery Energy Control Module communication loss have on the overall performance of a Buick?

- This code can impact the performance and efficiency of the hybrid system in the Buick, potentially leading to drivability issues and reduced fuel economy if left unresolved.

9. Is the repair for OBDII code U185A in a Buick related to the Battery Energy Control Module communication loss covered under warranty?

- Depending on the vehicle's warranty status, the repair for this specific code may be covered under certain warranties, especially if related to a faulty component or software issue.

10. How can I prevent OBDII code U185A from recurring in my Buick after repairing the communication issue with the Battery Energy Control Module?

- To prevent code U185A from recurring, it is essential to ensure proper maintenance of the high-voltage system, address any underlying issues promptly, and follow recommended service schedules provided by the manufacturer.