AutoCodes – Generic – U1875

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

Quick Answer

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. 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: U1875 indicates Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module.
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.

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Code Popularity 912

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1875 Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module. A module with a CAN serial data circuits malfunction or which loses power during the current ignition cycle will have a Loss of Communication Diagnostic Trouble Code (DTC) set by other modules that depend on information from that failed module. If any of the CAN circuit are shorted to battery voltage, ground, or between them no communication is possible on the CAN serial data bus, a Diagnostic Trouble Code will set.

OBDII Code U1875 - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module - AutoCodes.com — U1875 Code - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module

What does this mean?

What are the Possible Causes of the DTC U1875?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC U1875?

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 U1875 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.

Need more information about the U1875 code?

Need more information on how to fix the U1875 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1875 code diagnosed by a professional: Find a repair shop in your area

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.