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Engine-Codes – Generic – U1875

U1875 Code - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module

Quick Answer

The U1875 diagnostic trouble code (DTC) indicates that the Drive Motor Control Module 1 (DMCM1) has lost communication with the Battery Energy Control Module (BECM). Common causes include Faulty wiring or connections between DMCM1 and BECM, Defective DMCM1 or BECM, Electrical interference or signal disruption. 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
U1875 indicates Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module.
Common causes
Common causes include Faulty wiring or connections between DMCM1 and BECM, Defective DMCM1 or BECM, Electrical interference or signal disruption.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U1875 Description

The U1875 diagnostic trouble code (DTC) indicates that the Drive Motor Control Module 1 (DMCM1) has lost communication with the Battery Energy Control Module (BECM). In electric or hybrid vehicles, the DMCM1 is responsible for controlling the drive motor, while the BECM manages the battery energy system. When these two modules are unable to communicate with each other, it can lead to various performance issues in the vehicle.

OBDII Code U1875 - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module
U1875 Code - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module

Common Causes of U1875

  1. Faulty wiring or connections between DMCM1 and BECM
  2. Defective DMCM1 or BECM
  3. Electrical interference or signal disruption
  4. Software or programming issues in the modules
  5. Water or corrosion damage to the modules

Symptoms of U1875

  1. Loss of power or acceleration
  2. Reduced fuel efficiency
  3. Erratic or inconsistent performance
  4. Warning lights illuminated on the dashboard
  5. Vehicle may go into a limp mode

How to Fix U1875

  1. Begin by conducting a thorough inspection of the wiring and connections between the DMCM1 and BECM. Look for any loose connections, damaged wires, or corrosion that may be affecting the communication.
  2. Check the DMCM1 and BECM for any signs of damage or malfunctions. If either module is found to be faulty, it may need to be replaced.
  3. Clear the DTC and reset the modules to see if the communication is restored. Sometimes, a simple reset can resolve the issue.
  4. Update the software or reprogram the modules to ensure they are functioning correctly and communicating effectively.
  5. Test drive the vehicle to confirm that the communication between the DMCM1 and BECM has been restored and that the symptoms associated with the U1875 code have been resolved.

Cost to Fix U1875

The cost of repairing a U1875 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing a faulty module can range from $200 to $500 or more, while the labor costs can range from $100 to $300 or higher. Overall, the total repair costs for addressing a U1875 code can range from $300 to $800 or more, depending on the complexity of the repair and the rates charged by the auto repair shop. It is recommended to obtain a detailed estimate from a qualified mechanic or dealership to get a more accurate idea of the potential costs involved.

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Code U1875 Information for Specific Makes

  • U1875 Buick — Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module
  • U1875 Cadillac — Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module
  • U1875 Chevrolet — Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module
  • U1875 GMC — Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module
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 U1875 Code

1. What are the common symptoms of OBDII code U1875?

The common symptoms of U1875 include the check engine light coming on, reduced electric drive performance, and potential issues with the hybrid or electric drivetrain.

2. What could cause OBDII code U1875 to appear?

The code U1875 usually indicates a communication problem between the Drive Motor Control Module 1 and the Battery Energy Control Module, which can be caused by wiring issues, loose connections, or a faulty control module.

3. How can I diagnose the cause of OBDII code U1875?

Diagnosing code U1875 requires using a professional OBDII scanner to retrieve the code, checking the wiring and connections between the mentioned modules, and testing the modules themselves for proper communication.

4. Can I still drive my vehicle with OBDII code U1875?

It is not recommended to drive your vehicle with code U1875 present, as it can affect the drivability and performance of the vehicle. It is advised to address the issue promptly.

5. What are some repair tips for fixing OBDII code U1875?

Repair tips for U1875 include checking and repairing any damaged wiring, ensuring all connections are secure, resetting the fault codes after repairs, and, if necessary, replacing the faulty modules.

6. Can a DIY enthusiast fix OBDII code U1875?

Depending on the root cause of the problem, a skilled DIY enthusiast may be able to address code U1875 by carefully inspecting the wiring and connections. However, working with high-voltage systems in hybrid or electric vehicles should be approached with caution.

7. Will resetting the fault codes make OBDII code U1875 disappear permanently?

Resetting the fault codes may temporarily clear the code, but if the underlying issue causing U1875 is not addressed, the code is likely to reappear once the problem is detected again.

8. How urgent is it to address OBDII code U1875?

It is advisable to address code U1875 as soon as possible to prevent further damage to the vehicle's electrical system and drivetrain components. Ignoring the issue can lead to more severe problems down the line.

9. Is it safe to continue driving my hybrid or electric vehicle with OBDII code U1875?

Driving with code U1875 can pose a risk to the vehicle's performance and safety, especially in terms of electric drive control. It is recommended to have the issue diagnosed and repaired before driving the vehicle extensively.

10. What should I do if OBDII code U1875 keeps reoccurring after repairs?

If code U1875 keeps reoccurring after repairs, it may indicate an intermittent issue or a deeper underlying problem. In such cases, it is best to seek professional assistance to diagnose and resolve the persistent fault.

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