U185B Buick Code - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 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 Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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
- U185B Buick indicates Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus.
- Common causes
- Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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.
Code U185B Buick Description
This diagnostic is used to check the loss of communication with the Hybrid/EV Powertrain Control Module 2 on high voltage energy management high-speed General Motor Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module 2. If this message is not received within 1 s, this Diagnostic Trouble Code (DTC) is set.
What are the Possible Causes of the DTC U185B Buick?
- Faulty Hybrid/EV Powertrain Control Module 2
- Hybrid/EV Powertrain Control Module 2 harness is open or shorted
- Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection
How to Fix the DTC U185B 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 U185B 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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Frequently Asked Questions about U185B Buick Code
1. What are the common symptoms of OBDII code U185B in a Buick related to the Battery Energy Control Module?
- Common symptoms include loss of power, poor fuel efficiency, difficulty starting the vehicle, and warning lights on the dashboard.
2. What can cause the U185B code to trigger in a Buick?
- The code may be triggered by a communication breakdown between the Battery Energy Control Module and the Hybrid/EV Powertrain Control Module 2 on the High Voltage Energy Management CAN Bus.
3. How serious is the U185B code in a Buick?
- The code is considered serious as it can affect the performance and efficiency of the hybrid or electric powertrain system in the vehicle.
4. How can I diagnose the U185B code in my Buick?
- A professional diagnostic scan tool is required to read the code and pinpoint the exact cause of the communication loss between the modules.
5. Can I still drive my Buick with the U185B code present?
- It is not recommended to drive the vehicle with the U185B code present, as it can lead to further damage and potential safety issues.
6. Are there any DIY repair tips for the U185B code in a Buick?
- DIY repair is not recommended for this code, as it involves complex communication systems within the vehicle that require professional expertise.
7. How much does it cost to repair the U185B code in a Buick?
- The cost of repair can vary depending on the exact cause of the communication loss and the extent of the repairs needed. It is recommended to consult a professional for an accurate estimate.
8. Can resetting the code clear the U185B error in a Buick?
- Resetting the code may temporarily clear the error, but it is important to address the underlying issue causing the communication breakdown to prevent future occurrences.
9. Is the U185B code specific to Buick vehicles only?
- The U185B code is specific to Buick vehicles with hybrid or electric powertrain systems that use the mentioned modules for communication.
10. How can I prevent the U185B code from reoccurring in my Buick?
- Regular maintenance and timely repairs of any related issues can help prevent the U185B code from reoccurring in your Buick.
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