U185B Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 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 U185B 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.
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Frequently Asked Questions about U185B Chevrolet Code
1. What are common symptoms of the OBDII code U185B in a Chevrolet related to Battery Energy Control Module communication loss?
- Common symptoms may include check engine light illumination, poor hybrid/EV system performance, and potential drivability issues.
2. What could cause the U185B code in a Chevrolet indicating loss of communication between the Battery Energy Control Module and Hybrid/EV Powertrain Control Module 2?
- Possible causes may include damaged wiring or connectors, faulty control modules, software issues, or a weak hybrid/EV battery.
3. How can I diagnose the U185B code in a Chevrolet related to communication loss between modules?
- Diagnosing this code typically involves using a professional OBDII scanner to pinpoint the exact issue, checking for loose connections, and inspecting the wiring for any damage.
4. Can I still drive my Chevrolet with the U185B code present?
- It is not recommended to drive the vehicle with this code present, as it can lead to potential safety hazards and further damage to the hybrid/EV system.
5. What is the significance of the Battery Energy Control Module in a Chevrolet's hybrid/EV system?
- The Battery Energy Control Module plays a crucial role in managing the high-voltage energy flow within the hybrid/EV system, optimizing performance and efficiency.
6. How can I repair the U185B code in a Chevrolet myself?
- Repairing this code often requires advanced diagnostic tools and technical knowledge, so it is recommended to consult a professional mechanic or dealership for proper diagnosis and repair.
7. Is the U185B code specific to certain Chevrolet models?
- This code may be specific to certain Chevrolet models equipped with hybrid or electric powertrains, so it is essential to check the vehicle's manual or consult a mechanic for accurate information.
8. Can a weak hybrid/EV battery cause the U185B code to appear?
- Yes, a weak hybrid/EV battery can potentially trigger the U185B code due to insufficient power supply affecting communication between control modules.
9. How long does it typically take to repair the U185B code in a Chevrolet?
- The repair time for this code can vary depending on the exact cause, but it may range from a few hours to a day, depending on the complexity of the issue.
10. What should I do if the U185B code in my Chevrolet keeps recurring after repairs?
- If the U185B code keeps recurring after repairs, it is essential to recheck the diagnosis, ensure all repairs were completed correctly, and consider seeking further assistance from a professional technician.
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