U1807 Buick Code - Battery Charger 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 Charger Control Module, Battery Charger Control Module harness is open or shorted, Battery Charger 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
- U1807 Buick indicates Battery Charger Control Module High Voltage Energy Management CAN Bus Off.
- Common causes
- Common causes include Faulty Battery Charger Control Module, Battery Charger Control Module harness is open or shorted, Battery Charger 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 U1807 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 U1807 Buick?
- Faulty Battery Charger Control Module
- Battery Charger Control Module harness is open or shorted
- Battery Charger Control Module circuit poor electrical connection
How to Fix the DTC U1807 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 U1807 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 U1807 Buick Code
1. What are the common symptoms of OBDII code U1807 in a Buick related to the Battery Charger Control Module High Voltage Energy Management CAN Bus Off?
- Common symptoms include issues with charging the battery, potential loss of power, and warning lights on the dashboard.
2. What can cause the U1807 code to be triggered in a Buick?
- The U1807 code can be triggered by a fault in the battery charger control module, high voltage energy management system, or a communication issue on the CAN bus.
3. How serious is the U1807 code in a Buick?
- The U1807 code can lead to charging problems and potential power loss, so it is important to address the issue promptly to avoid further complications.
4. Can a DIY enthusiast repair the U1807 code in a Buick?
- Depending on the specific cause, some DIY repairs like checking connections or replacing a faulty module may be possible, but complex electrical issues may require professional diagnosis and repair.
5. What are some tips for repairing the U1807 code in a Buick?
- Tips for repairing the U1807 code include checking and cleaning electrical connections, inspecting the battery charger control module, and ensuring proper communication on the CAN bus.
6. Is it safe to continue driving with the U1807 code present in a Buick?
- It is not recommended to continue driving with the U1807 code present, as it can lead to battery charging issues and potential power loss, impacting the vehicle's performance and safety.
7. How can a mechanic diagnose the U1807 code in a Buick?
- A mechanic can diagnose the U1807 code using a diagnostic scanner to retrieve the specific fault codes, inspecting the battery charger control module, and testing the high voltage energy management system.
8. Are there any recalls or technical service bulletins related to the U1807 code in Buick vehicles?
- It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to the U1807 code in Buick vehicles to address potential known issues.
9. What is the typical cost to repair the U1807 code in a Buick?
- The cost to repair the U1807 code can vary depending on the specific cause and required repairs, but it is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.
10. How can I prevent the U1807 code from reoccurring in my Buick?
- To prevent the U1807 code from reoccurring, it is essential to address any underlying issues promptly, perform regular maintenance checks on the charging system, and ensure proper electrical connections are secure.
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