U1806 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What are the common symptoms of OBDII code U1806 in a Cadillac related to the Battery Energy Control Module?
- Common symptoms include issues with the vehicle's hybrid battery system, decreased fuel efficiency, and potential drivability issues.
2. What causes the U1806 code to be triggered in a Cadillac?
- This code is typically triggered when there is a communication fault between the Battery Energy Control Module and the High Voltage Energy Management CAN Bus.
3. How can I diagnose the U1806 code in my Cadillac?
- Diagnosis involves using a diagnostic scanner to retrieve the code, checking the connections and wiring related to the Battery Energy Control Module, and verifying the voltage levels in the system.
4. Can I drive my Cadillac with the U1806 code present?
- It is not recommended to drive the vehicle with this code present, as it may lead to further issues with the hybrid system and affect the overall performance of the vehicle.
5. How do I repair the Battery Energy Control Module High Voltage Energy Management CAN Bus Off issue in my Cadillac?
- Repairing this issue involves addressing the communication fault by inspecting and repairing any damaged wiring, connectors, or modules in the system.
6. Is the U1806 code a serious issue in a Cadillac?
- Yes, the U1806 code indicates a problem with the hybrid system's communication, which can impact the vehicle's performance and fuel efficiency.
7. Can a DIY enthusiast fix the U1806 code in a Cadillac?
- While some basic troubleshooting can be done by DIY enthusiasts, resolving the U1806 code may require specialized tools and expertise, making it more suitable for professional repair.
8. What are the potential risks of ignoring the U1806 code in a Cadillac?
- Ignoring the U1806 code can lead to further damage to the hybrid system, increased fuel consumption, and potential safety hazards on the road.
9. How long does it typically take to repair the U1806 code in a Cadillac?
- The repair time can vary depending on the extent of the issue, but it may take a few hours to a full day to diagnose and fix the problem related to the U1806 code.
10. Is it necessary to reset the OBDII system after repairing the U1806 code in a Cadillac?
- Yes, it is recommended to reset the OBDII system after repairing the U1806 code to clear the fault code and ensure proper functioning of the hybrid system.
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