AutoCodes – GMC – U1807 GMC

U1807 GMC 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 GMC 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.

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Code Popularity 501

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1807 GMC Description

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. If this serial data system is inoperative the devices will not communicate with each other on this bus, but they still communicate with the scan tool through high-speed GMLAN bus.
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.

OBDII Code U1807 GMC - Battery Charger Control Module High Voltage Energy Management CAN Bus Off - AutoCodes.com — U1807 GMC Code - Battery Charger Control Module High Voltage Energy Management CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U1807 GMC?

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 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 U1807 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1807 GMC Code

1. What are the common symptoms of OBDII code U1807 in a GMC vehicle?

The common symptoms of OBDII code U1807 in a GMC vehicle may include issues with the battery charger control module, high voltage energy management system, and CAN bus communication.

2. What are some possible causes of OBDII code U1807 in a GMC vehicle?

Possible causes of OBDII code U1807 in a GMC vehicle include a malfunctioning battery charger control module, issues with the high voltage energy management system, or problems with the CAN bus communication network.

3. How can I diagnose OBDII code U1807 in a GMC vehicle?

Diagnosing OBDII code U1807 in a GMC vehicle typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the battery charger control module and related components, and testing the CAN bus communication network for any faults.

4. What are some repair tips for fixing OBDII code U1807 in a GMC vehicle?

Repairing OBDII code U1807 in a GMC vehicle may involve repairing or replacing the battery charger control module, addressing any issues with the high voltage energy management system, and ensuring proper communication on the CAN bus network.

5. Can I drive my GMC vehicle with OBDII code U1807?

It is not recommended to drive your GMC vehicle with OBDII code U1807, as it may indicate potential issues with the battery charger control module, high voltage energy management system, or CAN bus communication, which can affect the overall performance and safety of the vehicle.

6. How much does it typically cost to repair OBDII code U1807 in a GMC vehicle?

The cost of repairing OBDII code U1807 in a GMC vehicle can vary depending on the specific underlying issue, parts needed for repair, and labor costs. It's best to consult with a professional mechanic for an accurate estimate.

7. Is OBDII code U1807 a serious issue in a GMC vehicle?

OBDII code U1807 in a GMC vehicle can be a serious issue, as it may indicate problems with critical systems like the battery charger control module, high voltage energy management, and CAN bus communication. It's important to address this code promptly to prevent further damage.

8. Can I reset OBDII code U1807 in a GMC vehicle on my own?

Resetting OBDII code U1807 in a GMC vehicle may temporarily clear the code, but it is essential to diagnose and repair the underlying issue causing the fault code to prevent it from reoccurring. Consult with a professional mechanic for proper diagnosis and repair.

9. Will OBDII code U1807 cause my GMC vehicle to fail an emissions test?

OBDII code U1807 may cause your GMC vehicle to fail an emissions test, as it indicates issues with the battery charger control module, high voltage energy management system, or CAN bus communication. It's recommended to address this code before undergoing an emissions test.

10. How long does it take to repair OBDII code U1807 in a GMC vehicle?

The time it takes to repair OBDII code U1807 in a GMC vehicle can vary depending on the specific issue and the availability of parts. Some repairs may be completed in a few hours, while others may take longer. Consult with a professional mechanic for a more accurate timeframe.