U1806 Buick 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 Buick 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 Buick 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 Buick?
- 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 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 U1806 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 U1806 Buick Code
1. What are the common symptoms of OBDII code U1806 in a Buick related to the Battery Energy Control Module High Voltage Energy Management CAN Bus Off?
- Common symptoms include loss of power, poor fuel economy, and potential issues with the hybrid/electric drive system.
2. What are the possible causes of OBDII code U1806 in a Buick?
- The code U1806 can be triggered by a faulty battery energy control module, high voltage energy management system issues, CAN bus communication problems, or wiring harness issues.
3. How can I diagnose the OBDII code U1806 in my Buick?
- Diagnosis typically involves using a professional OBDII scanner to read and interpret the code, checking the battery energy control module, inspecting the CAN bus connections, and testing the high voltage energy management system.
4. What are some repair tips for fixing OBDII code U1806 in a Buick?
- Repair tips may include checking and repairing any damaged wiring, replacing a faulty battery energy control module, ensuring proper CAN bus communication, and performing a software update if necessary.
5. Is it safe to continue driving with OBDII code U1806 present in a Buick?
- It is not recommended to continue driving with this code present, as it can lead to further damage to the high voltage energy management system and potentially compromise the vehicle's performance.
6. Can OBDII code U1806 be cleared/reset without fixing the underlying issue in a Buick?
- While the code can be cleared temporarily, it is important to address the underlying issue causing the code to prevent it from reoccurring and potentially causing more severe problems in the future.
7. How much does it typically cost to repair OBDII code U1806 in a Buick?
- The cost of repairing this code can vary depending on the specific issue, but it may involve diagnostic fees, parts replacement costs, and labor charges, which can add up to a few hundred dollars or more.
8. Are there any recalls or technical service bulletins related to OBDII code U1806 in Buick vehicles?
- It is recommended to check with Buick dealership or the manufacturer for any recalls or technical service bulletins related to OBDII code U1806 to see if there are any known issues or remedies.
9. Can a DIY enthusiast fix OBDII code U1806 in a Buick, or is it recommended to seek professional help?
- While some basic troubleshooting steps can be performed by enthusiasts, diagnosing and repairing OBDII code U1806 may require specialized tools and expertise, so it is often recommended to seek professional help for accurate diagnosis and repair.
10. How can regular maintenance help prevent OBDII code U1806 from appearing in a Buick?
- Regular maintenance, including checking the hybrid/electric drive system components, ensuring proper battery health, and inspecting wiring connections, can help prevent issues that may lead to the triggering of OBDII code U1806.
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