AutoCodes – Cadillac – U2107 Cadillac

U2107 Cadillac Code - Lost Communication With Body 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 Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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: U2107 Cadillac indicates Lost Communication With Body Control Module.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 472

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 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U2107 Cadillac 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 U2107 Cadillac - Lost Communication With Body Control Module - AutoCodes.com — U2107 Cadillac Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U2107 Cadillac?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U2107 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 U2107 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.

Need more information about the U2107 Cadillac code?

Need more information on how to fix the U2107 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2107 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 U2107 Cadillac Code

1. What are the common symptoms of OBDII code U2107 in a Cadillac indicating lost communication with the Body Control Module?

- Common symptoms include issues with power windows, door locks, interior lighting, and other body control functions not working properly.

2. What are the possible causes of OBDII code U2107 in a Cadillac?

- The code U2107 can be caused by a faulty Body Control Module, damaged wiring, poor connections, or a software issue within the module.

3. How can I diagnose the cause of OBDII code U2107 in my Cadillac?

- A thorough diagnosis involves checking the wiring harness for damage, ensuring proper connections, and performing a scan tool test to communicate with the Body Control Module.

4. Is it safe to continue driving my Cadillac with the U2107 code indicating lost communication with the Body Control Module?

- It is not recommended to drive the vehicle with this code as it can affect critical functions controlled by the Body Control Module, compromising safety and convenience.

5. Can I reset the U2107 code in my Cadillac using an OBDII scanner?

- While resetting the code may temporarily clear the error, it is important to address the underlying issue causing the communication loss with the Body Control Module to prevent it from reoccurring.

6. How much does it typically cost to repair OBDII code U2107 in a Cadillac?

- The cost of repairing U2107 can vary depending on the cause of the issue, but it may involve replacing the Body Control Module, repairing wiring, or addressing connectivity issues, potentially ranging from a few hundred to over a thousand dollars.

7. Are there any DIY repair tips for fixing OBDII code U2107 in a Cadillac?

- DIY repair for U2107 may involve checking and securing the electrical connections, inspecting the wiring harness for damage, and ensuring proper grounding to troubleshoot the issue before seeking professional help.

8. Can extreme weather conditions contribute to triggering OBDII code U2107 in a Cadillac?

- Yes, extreme weather conditions such as temperature fluctuations or moisture can potentially affect the electrical connections and lead to communication issues with the Body Control Module, triggering code U2107.

9. How long does it take to repair OBDII code U2107 in a Cadillac at a professional auto repair shop?

- The repair time for U2107 can vary depending on the complexity of the issue and the availability of parts, but it typically takes a few hours to a full day to diagnose and fix the problem.

10. Is it necessary to visit a dealership for repairing OBDII code U2107 in a Cadillac, or can independent auto repair shops handle the issue?

- Independent auto repair shops with experience in Cadillac vehicles can typically diagnose and repair OBDII code U2107 effectively, offering a more cost-effective solution compared to dealership services.