AutoCodes – Cadillac – U185A Cadillac

U185A Cadillac 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 Cadillac 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 645

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

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 Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms include check engine light illumination, loss of power, poor fuel efficiency, and potential drivability issues.

2. What are possible causes of the U185A code indicating a lost communication with the Battery Energy Control Module on the high voltage energy management CAN bus in a Cadillac?

- Possible causes can include wiring or connector issues, 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 a Cadillac related to the Battery Energy Control Module communication problem?

- Diagnosing the issue involves using an OBDII scanner to read the code and further advanced diagnostics to pinpoint the exact cause, which may require professional expertise.

4. Are there any recommended repair tips for resolving the U185A code in a Cadillac indicating a communication fault with the Battery Energy Control Module?

- Repair tips may include inspecting and repairing any damaged wiring, ensuring secure connections, updating software if applicable, or replacing the Battery Energy Control Module if necessary.

5. Can driving with the U185A code present in a Cadillac lead to further damage or safety concerns?

- Continuing to drive with the U185A code present may cause further issues with the vehicle's performance and efficiency, and it's advisable to address the problem promptly to prevent any potential safety risks.

6. Is it possible to reset the U185A trouble code in a Cadillac without addressing the underlying communication problem with the Battery Energy Control Module?

- Resetting the code without addressing the root cause will likely result in the code reappearing once the issue persists, so it's important to diagnose and repair the problem correctly.

7. How much can I expect to pay for repairs related to the U185A code in a Cadillac associated with a lost communication with the Battery Energy Control Module?

- Repair costs can vary depending on the exact cause of the issue, but they may involve labor fees for diagnostics and repair, as well as potential part replacements.

8. Are there any recalls or technical service bulletins (TSBs) from Cadillac related to the U185A code and communication problems with the Battery Energy Control Module?

- It's recommended to check with your local Cadillac dealership or online resources for any relevant recalls or TSBs related to the U185A code and communication issues with the Battery Energy Control Module.

9. Can I attempt to fix the U185A code myself in a Cadillac, or should I seek professional help?

- While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving the U185A code often requires specialized tools and expertise, so seeking professional help is advisable for an accurate diagnosis and repair.

10. How long can I safely drive my Cadillac with the U185A code indicating a lost communication with the Battery Energy Control Module before getting it fixed?

- It's best to address the issue promptly to avoid potential performance issues or safety concerns, so limiting driving and seeking repairs as soon as possible is recommended.