AutoCodes – Buick – U2137 Buick

U2137 Buick Code - Lost Communications With Vehicle Theft Deterrent Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Vehicle Theft Deterrent Module, Vehicle Theft Deterrent Module harness is open or shorted, Vehicle Theft Deterrent 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: U2137 Buick indicates Lost Communications With Vehicle Theft Deterrent Module.
Common causes: Common causes include Faulty Vehicle Theft Deterrent Module, Vehicle Theft Deterrent Module harness is open or shorted, Vehicle Theft Deterrent 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 536

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 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2137 Buick Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2137 Buick - Lost Communications With Vehicle Theft Deterrent Module - AutoCodes.com — U2137 Buick Code - Lost Communications With Vehicle Theft Deterrent Module

What does this mean?

What are the Possible Causes of the DTC U2137 Buick?

Faulty Vehicle Theft Deterrent Module
Vehicle Theft Deterrent Module harness is open or shorted
Vehicle Theft Deterrent Module circuit poor electrical connection

How to Fix the DTC U2137 Buick?

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 U2137 Buick 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 U2137 Buick Code

1. What does the OBDII code U2137 mean on a Buick?

The U2137 code indicates a "Lost Communication With Vehicle Theft Deterrent Module," meaning the module is not communicating properly with other control modules in the vehicle.

2. What are the common symptoms of the U2137 code on a Buick?

Common symptoms include the engine not starting, security warning light staying on, intermittent starting issues, or other security system malfunctions.

3. What causes the U2137 code to appear on a Buick?

Causes can include faulty wiring or connections, a failing vehicle theft deterrent module, a dead battery, or issues with the CAN (Controller Area Network) bus system.

4. Can a weak car battery trigger the U2137 code?

Yes, a weak or failing battery can cause communication issues between modules, potentially triggering the U2137 code.

5. How can I diagnose the U2137 code on my Buick?

Start by checking the battery voltage, inspecting wiring and connectors for damage or corrosion, and using a scan tool to verify communication with the theft deterrent module.

6. Is the U2137 code specific to Buick vehicles?

No, the U2137 code can appear on various vehicles, but the troubleshooting steps and symptoms may differ depending on the make and model.

7. Can I drive my Buick with the U2137 code active?

Driving may not be possible if the theft deterrent system prevents the engine from starting. Even if the car starts, itâ€™s important to address the issue promptly.

8. How do I fix the U2137 code on a Buick?

Repairs may involve replacing damaged wiring, reconnecting loose connectors, reprogramming or replacing the theft deterrent module, or addressing issues in the CAN bus system.

9. Does the U2137 code require professional repair?

While basic checks like inspecting wiring can be done at home, diagnosing and repairing module communication issues often require specialized tools and expertise.

10. Can resetting the ECU clear the U2137 code?

Resetting the ECU might temporarily clear the code, but if the underlying issue isnâ€™t resolved, the code is likely to return.