AutoCodes – Saturn – U2107 Saturn

U2107 Saturn 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 Saturn 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.

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Code Popularity 3,116

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

What does this mean?

What are the Possible Causes of the DTC U2107 Saturn?

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 Saturn?

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 Saturn 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 U2107 Saturn Code

1. What are the common symptoms of OBDII code U2107 (Lost Communication With Body Control Module) in a Saturn?

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

2. What are some possible causes of the U2107 code in a Saturn?

- Possible causes include a faulty body control module, damaged wiring or connectors, low battery voltage, or a communication network issue.

3. How can I diagnose the U2107 code in my Saturn?

- Diagnosing the U2107 code typically involves checking for other related codes, inspecting wiring and connectors, testing the body control module, and verifying communication network integrity.

4. Can I drive my Saturn with the U2107 code present?

- It is generally not recommended to drive with the U2107 code as it may impact critical vehicle functions controlled by the body control module.

5. How can I repair the U2107 code in my Saturn?

- Repairing the U2107 code may involve replacing the body control module, repairing or replacing damaged wiring, ensuring proper battery voltage, and reprogramming the module as needed.

6. Is it possible to reset the U2107 code in a Saturn without fixing the underlying issue?

- While you can clear the code with a diagnostic tool, it is important to address the root cause to prevent the code from reoccurring.

7. Will disconnecting the battery reset the U2107 code in a Saturn?

- Disconnecting the battery may clear the code temporarily, but it is advisable to diagnose and repair the issue to prevent the code from returning.

8. Can extreme weather conditions trigger the U2107 code in a Saturn?

- Extreme weather conditions can potentially exacerbate existing issues leading to the U2107 code, especially if there are underlying wiring or connectivity problems.

9. How long does it take to repair the U2107 code in a Saturn?

- The repair time for the U2107 code can vary depending on the underlying cause, availability of parts, and the complexity of the diagnosis and repair process.

10. Should I attempt to fix the U2107 code in my Saturn myself, or seek professional help?

- It is recommended to seek professional help for diagnosing and repairing the U2107 code, especially if you are not experienced with automotive electrical systems.