U185C Code - Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
Quick Answer
The diagnostic trouble code U185C indicates that the Battery Charger Control Module has lost communication with the Hybrid/EV Powertrain Control Module 2 on the High Voltage Energy Management CAN Bus. Common causes include Faulty Control Modules: Malfunctioning or damaged Battery Charger Control Module or Hybrid/EV Powertrain Control Module 2 can disrupt communication, Wiring Issues: Corroded, damaged, or disconnected wiring in the CAN bus system can prevent proper communication between modules, Software Glitch: Software errors or glitches in the control modules can interfere with communication and trigger the U185C code. 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
- U185C indicates Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus.
- Common causes
- Common causes include Faulty Control Modules: Malfunctioning or damaged Battery Charger Control Module or Hybrid/EV Powertrain Control Module 2 can disrupt communication, Wiring Issues: Corroded, damaged, or disconnected wiring in the CAN bus system can prevent proper communication between modules, Software Glitch: Software errors or glitches in the control modules can interfere with communication and trigger the U185C code.
- 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 U185C Description
The diagnostic trouble code U185C indicates that the Battery Charger Control Module has lost communication with the Hybrid/EV Powertrain Control Module 2 on the High Voltage Energy Management CAN Bus. In modern vehicles, the communication between various control modules is crucial for proper functioning and coordination of different systems within the vehicle. In this case, the loss of communication between these specific modules can have significant implications for the vehicle's performance and overall functionality.
Common Causes of U185C
- Faulty Control Modules: Malfunctioning or damaged Battery Charger Control Module or Hybrid/EV Powertrain Control Module 2 can disrupt communication.
- Wiring Issues: Corroded, damaged, or disconnected wiring in the CAN bus system can prevent proper communication between modules.
- Software Glitch: Software errors or glitches in the control modules can interfere with communication and trigger the U185C code.
- Power Surges or Electrical Issues: High voltage spikes, electrical disturbances, or power surges can disrupt communication between modules.
- Environmental Factors: Extreme temperatures, moisture, or environmental factors can affect the functioning of control modules and communication systems.
Symptoms of U185C
- Check Engine Light: The illumination of the check engine light is a common symptom associated with communication errors between control modules.
- Reduced Power: The vehicle may experience a loss of power or reduced performance due to the improper functioning of the high voltage energy management system.
- Charging Issues: Problems with charging the battery or maintaining proper voltage levels can indicate issues with communication between control modules.
- Inconsistent Hybrid/EV Operation: The vehicle may exhibit erratic behavior in hybrid or electric mode, such as difficulty transitioning between power sources.
How to Fix U185C
- Diagnostic Scan: Use a diagnostic scan tool to retrieve the U185C code and identify the specific control modules and communication issues.
- Check Wiring: Inspect the wiring harnesses and connections in the High Voltage Energy Management CAN Bus for any damage, corrosion, or loose connections.
- Control Module Testing: Test the Battery Charger Control Module and Hybrid/EV Powertrain Control Module 2 for proper functioning and communication capabilities.
- Software Update: Perform software updates or reprogramming on the control modules to address any software glitches or errors causing communication issues.
- Replace Faulty Components: Replace any faulty control modules, wiring harnesses, or components that are identified as the root cause of the communication problem.
Cost to Fix U185C
The typical repair costs for addressing the U185C code can vary depending on the specific diagnosis and repair required. In general, repairing communication issues between control modules may involve diagnostic fees, labor costs for troubleshooting and repair, as well as potential costs for parts replacement or software updates. On average, the repair costs for this issue may range from $200 to $500, including parts and labor. However, it's important to note that actual repair costs can vary based on factors such as the vehicle make and model, the severity of the issue, and the rates charged by auto repair shops in different locations. Therefore, it's advisable to consult with a professional mechanic or auto repair shop for a more accurate cost estimate based on the specific circumstances of the vehicle.
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Code U185C Information for Specific Makes
- U185C Buick — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
- U185C Cadillac — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
- U185C Chevrolet — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
- U185C GMC — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
Frequently Asked Questions about U185C Code
1. What are the common symptoms of OBDII code U185C?
- Common symptoms include check engine light illumination, loss of communication between the battery charger control module and hybrid/EV powertrain control module 2, and potential issues with the high voltage energy management CAN bus.
2. What could cause the Battery Charger Control Module to lose communication with the Hybrid/EV Powertrain Control Module 2?
- Possible causes include damaged wiring or connectors, a faulty battery charger control module, issues with the hybrid/EV powertrain control module 2, or disruptions in the high voltage energy management CAN bus.
3. How can I diagnose the source of the communication loss between modules for code U185C?
- Diagnose by checking for loose or damaged wiring, inspecting connectors for corrosion or bent pins, testing the battery charger control module and hybrid/EV powertrain control module 2 for functionality, and scanning the high voltage energy management CAN bus for faults.
4. Is it safe to drive with OBDII code U185C present?
- It is not recommended to drive with this code present, as communication issues between critical modules can impact the performance and safety of the hybrid/EV system. Seek professional diagnosis and repair promptly.
5. Can a DIY enthusiast repair OBDII code U185C at home?
- Repairing this code may require advanced diagnostic tools and knowledge of hybrid/EV systems. It is advisable to consult a qualified technician or dealership for proper diagnosis and repair to prevent further complications.
6. How much does it typically cost to fix OBDII code U185C?
- The cost of repair can vary depending on the exact cause of the communication loss and the necessary parts or labor involved. Seek estimates from reputable automotive shops or dealerships for accurate pricing.
7. Are there any safety precautions to take when dealing with OBDII code U185C?
- When working on hybrid/EV systems, always follow manufacturer safety guidelines, wear appropriate personal protective equipment, and be cautious around high voltage components to prevent electric shock or injury.
8. Can resetting the OBDII code U185C resolve the communication issue between modules?
- Resetting the code may temporarily clear the fault, but if the underlying issue is not addressed, the code is likely to return. Proper diagnosis and repair are necessary to fix the communication problem permanently.
9. How long does it typically take to repair OBDII code U185C?
- The repair time can vary based on the complexity of the diagnosis and the availability of parts. Some fixes may be completed within a few hours, while others may require more extensive troubleshooting and repair work.
10. Is OBDII code U185C specific to certain vehicle makes and models?
- This code may be specific to hybrid or electric vehicles equipped with the mentioned modules and CAN bus communication system. Consult the vehicle's service manual or a professional technician for model-specific information.
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