U1806 GMC Code - Battery Energy Control Module High Voltage Energy Management CAN Bus Off
Quick Answer
The high voltage energy management high-speed General Motor Local Area Network (GMLAN) serial data circuits are serial data buses used to communicate information between the Hybrid Powertrain Control Module 2, the Battery Energy Control Module, and the Battery Charger. 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
- U1806 GMC indicates Battery Energy Control Module High Voltage Energy Management CAN Bus Off.
- 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.
Code U1806 GMC Description
The scan tool does not communicate with devices through the high voltage energy management high-speed GMLAN bus. The high voltage energy high-speed GMLAN serial data circuits connect directly to the auxiliary data connector and do not connect with the scan tool.
The Diagnostic Trouble Code (DTC) will set when the device setting the DTC has attempted to establish communications on the serial data circuits for more than 1.4 seconds without success.
What are the Possible Causes of the DTC U1806 GMC?
- Faulty Battery Energy Control Module
- Battery Energy Control Module harness is open or shorted
- Battery Energy Control Module circuit poor electrical connection
- Faulty Hybrid Powertrain Control Module 2
How to Fix the DTC U1806 GMC?
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 U1806 GMC 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 U1806 GMC Code
1. What are common symptoms of OBDII code U1806 GMC?
The common symptoms of code U1806 GMC may include issues with the battery energy control module, high voltage energy management, and the CAN bus.
2. What does the U1806 GMC code indicate?
The U1806 GMC code typically indicates a problem with the Battery Energy Control Module (BECM) high voltage energy management CAN bus communication being off.
3. What are possible causes of code U1806 GMC?
Possible causes of code U1806 GMC include a faulty Battery Energy Control Module (BECM), issues with the high voltage energy management system, or problems with the CAN bus communication.
4. How can I diagnose the U1806 GMC trouble code?
To diagnose the U1806 GMC trouble code, a professional diagnostic tool is usually required to scan the vehicle's onboard computer system and retrieve the specific fault codes. This will help pinpoint the exact issue causing the code.
5. Can I repair the U1806 GMC code myself?
Repairing the U1806 GMC code may require advanced automotive knowledge and specialized tools. It is recommended to consult a professional mechanic or dealership for proper diagnosis and repair.
6. What are the potential risks of ignoring the U1806 GMC trouble code?
Ignoring the U1806 GMC trouble code can lead to further damage to the high voltage energy management system, potential battery issues, and unsafe operation of the vehicle.
7. How much does it cost to fix OBDII code U1806 GMC?
The cost to fix OBDII code U1806 GMC can vary depending on the underlying cause of the issue. It is advisable to get a diagnostic assessment from a qualified mechanic to determine the exact repair cost.
8. Can a weak car battery trigger the U1806 GMC trouble code?
A weak car battery may not directly trigger the U1806 GMC trouble code, but it can contribute to issues with the battery energy control module and high voltage energy management system, potentially leading to related problems.
9. Are there any preventive maintenance tips to avoid OBDII code U1806 GMC?
Regularly maintaining the vehicle's battery, high voltage energy management system, and CAN bus communication can help prevent issues that may trigger the U1806 GMC trouble code.
10. Is it safe to continue driving with the U1806 GMC trouble code illuminated?
It is not recommended to continue driving with the U1806 GMC trouble code illuminated, as it indicates a potential issue with critical systems in the vehicle that can affect its performance and safety.
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